mac80211.h revision d85dad75566674ca8012715ac00a84ced3697972
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#ifndef MAC80211_H 14#define MAC80211_H 15 16#include <linux/bug.h> 17#include <linux/kernel.h> 18#include <linux/if_ether.h> 19#include <linux/skbuff.h> 20#include <linux/ieee80211.h> 21#include <net/cfg80211.h> 22#include <asm/unaligned.h> 23 24/** 25 * DOC: Introduction 26 * 27 * mac80211 is the Linux stack for 802.11 hardware that implements 28 * only partial functionality in hard- or firmware. This document 29 * defines the interface between mac80211 and low-level hardware 30 * drivers. 31 */ 32 33/** 34 * DOC: Calling mac80211 from interrupts 35 * 36 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 37 * called in hardware interrupt context. The low-level driver must not call any 38 * other functions in hardware interrupt context. If there is a need for such 39 * call, the low-level driver should first ACK the interrupt and perform the 40 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 41 * tasklet function. 42 * 43 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 44 * use the non-IRQ-safe functions! 45 */ 46 47/** 48 * DOC: Warning 49 * 50 * If you're reading this document and not the header file itself, it will 51 * be incomplete because not all documentation has been converted yet. 52 */ 53 54/** 55 * DOC: Frame format 56 * 57 * As a general rule, when frames are passed between mac80211 and the driver, 58 * they start with the IEEE 802.11 header and include the same octets that are 59 * sent over the air except for the FCS which should be calculated by the 60 * hardware. 61 * 62 * There are, however, various exceptions to this rule for advanced features: 63 * 64 * The first exception is for hardware encryption and decryption offload 65 * where the IV/ICV may or may not be generated in hardware. 66 * 67 * Secondly, when the hardware handles fragmentation, the frame handed to 68 * the driver from mac80211 is the MSDU, not the MPDU. 69 */ 70 71/** 72 * DOC: mac80211 workqueue 73 * 74 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 75 * The workqueue is a single threaded workqueue and can only be accessed by 76 * helpers for sanity checking. Drivers must ensure all work added onto the 77 * mac80211 workqueue should be cancelled on the driver stop() callback. 78 * 79 * mac80211 will flushed the workqueue upon interface removal and during 80 * suspend. 81 * 82 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 83 * 84 */ 85 86struct device; 87 88/** 89 * enum ieee80211_max_queues - maximum number of queues 90 * 91 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 92 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set 93 */ 94enum ieee80211_max_queues { 95 IEEE80211_MAX_QUEUES = 16, 96 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1, 97}; 98 99#define IEEE80211_INVAL_HW_QUEUE 0xff 100 101/** 102 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 103 * @IEEE80211_AC_VO: voice 104 * @IEEE80211_AC_VI: video 105 * @IEEE80211_AC_BE: best effort 106 * @IEEE80211_AC_BK: background 107 */ 108enum ieee80211_ac_numbers { 109 IEEE80211_AC_VO = 0, 110 IEEE80211_AC_VI = 1, 111 IEEE80211_AC_BE = 2, 112 IEEE80211_AC_BK = 3, 113}; 114#define IEEE80211_NUM_ACS 4 115 116/** 117 * struct ieee80211_tx_queue_params - transmit queue configuration 118 * 119 * The information provided in this structure is required for QoS 120 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 121 * 122 * @aifs: arbitration interframe space [0..255] 123 * @cw_min: minimum contention window [a value of the form 124 * 2^n-1 in the range 1..32767] 125 * @cw_max: maximum contention window [like @cw_min] 126 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 127 * @acm: is mandatory admission control required for the access category 128 * @uapsd: is U-APSD mode enabled for the queue 129 */ 130struct ieee80211_tx_queue_params { 131 u16 txop; 132 u16 cw_min; 133 u16 cw_max; 134 u8 aifs; 135 bool acm; 136 bool uapsd; 137}; 138 139struct ieee80211_low_level_stats { 140 unsigned int dot11ACKFailureCount; 141 unsigned int dot11RTSFailureCount; 142 unsigned int dot11FCSErrorCount; 143 unsigned int dot11RTSSuccessCount; 144}; 145 146/** 147 * enum ieee80211_chanctx_change - change flag for channel context 148 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 149 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 150 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 151 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, 152 * this is used only with channel switching with CSA 153 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed 154 */ 155enum ieee80211_chanctx_change { 156 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 157 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 158 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 159 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), 160 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), 161}; 162 163/** 164 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 165 * 166 * This is the driver-visible part. The ieee80211_chanctx 167 * that contains it is visible in mac80211 only. 168 * 169 * @def: the channel definition 170 * @min_def: the minimum channel definition currently required. 171 * @rx_chains_static: The number of RX chains that must always be 172 * active on the channel to receive MIMO transmissions 173 * @rx_chains_dynamic: The number of RX chains that must be enabled 174 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 175 * this will always be >= @rx_chains_static. 176 * @radar_enabled: whether radar detection is enabled on this channel. 177 * @drv_priv: data area for driver use, will always be aligned to 178 * sizeof(void *), size is determined in hw information. 179 */ 180struct ieee80211_chanctx_conf { 181 struct cfg80211_chan_def def; 182 struct cfg80211_chan_def min_def; 183 184 u8 rx_chains_static, rx_chains_dynamic; 185 186 bool radar_enabled; 187 188 u8 drv_priv[0] __aligned(sizeof(void *)); 189}; 190 191/** 192 * enum ieee80211_bss_change - BSS change notification flags 193 * 194 * These flags are used with the bss_info_changed() callback 195 * to indicate which BSS parameter changed. 196 * 197 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 198 * also implies a change in the AID. 199 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 200 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 201 * @BSS_CHANGED_ERP_SLOT: slot timing changed 202 * @BSS_CHANGED_HT: 802.11n parameters changed 203 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 204 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 205 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 206 * reason (IBSS and managed mode) 207 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 208 * new beacon (beaconing modes) 209 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 210 * enabled/disabled (beaconing modes) 211 * @BSS_CHANGED_CQM: Connection quality monitor config changed 212 * @BSS_CHANGED_IBSS: IBSS join status changed 213 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 214 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 215 * that it is only ever disabled for station mode. 216 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 217 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode) 218 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 219 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 220 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 221 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 222 * changed (currently only in P2P client mode, GO mode will be later) 223 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available: 224 * currently dtim_period only is under consideration. 225 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 226 * note that this is only called when it changes after the channel 227 * context had been assigned. 228 */ 229enum ieee80211_bss_change { 230 BSS_CHANGED_ASSOC = 1<<0, 231 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 232 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 233 BSS_CHANGED_ERP_SLOT = 1<<3, 234 BSS_CHANGED_HT = 1<<4, 235 BSS_CHANGED_BASIC_RATES = 1<<5, 236 BSS_CHANGED_BEACON_INT = 1<<6, 237 BSS_CHANGED_BSSID = 1<<7, 238 BSS_CHANGED_BEACON = 1<<8, 239 BSS_CHANGED_BEACON_ENABLED = 1<<9, 240 BSS_CHANGED_CQM = 1<<10, 241 BSS_CHANGED_IBSS = 1<<11, 242 BSS_CHANGED_ARP_FILTER = 1<<12, 243 BSS_CHANGED_QOS = 1<<13, 244 BSS_CHANGED_IDLE = 1<<14, 245 BSS_CHANGED_SSID = 1<<15, 246 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 247 BSS_CHANGED_PS = 1<<17, 248 BSS_CHANGED_TXPOWER = 1<<18, 249 BSS_CHANGED_P2P_PS = 1<<19, 250 BSS_CHANGED_BEACON_INFO = 1<<20, 251 BSS_CHANGED_BANDWIDTH = 1<<21, 252 253 /* when adding here, make sure to change ieee80211_reconfig */ 254}; 255 256/* 257 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 258 * of addresses for an interface increase beyond this value, hardware ARP 259 * filtering will be disabled. 260 */ 261#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 262 263/** 264 * enum ieee80211_rssi_event - RSSI threshold event 265 * An indicator for when RSSI goes below/above a certain threshold. 266 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 267 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 268 */ 269enum ieee80211_rssi_event { 270 RSSI_EVENT_HIGH, 271 RSSI_EVENT_LOW, 272}; 273 274/** 275 * struct ieee80211_bss_conf - holds the BSS's changing parameters 276 * 277 * This structure keeps information about a BSS (and an association 278 * to that BSS) that can change during the lifetime of the BSS. 279 * 280 * @assoc: association status 281 * @ibss_joined: indicates whether this station is part of an IBSS 282 * or not 283 * @ibss_creator: indicates if a new IBSS network is being created 284 * @aid: association ID number, valid only when @assoc is true 285 * @use_cts_prot: use CTS protection 286 * @use_short_preamble: use 802.11b short preamble; 287 * if the hardware cannot handle this it must set the 288 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 289 * @use_short_slot: use short slot time (only relevant for ERP); 290 * if the hardware cannot handle this it must set the 291 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 292 * @dtim_period: num of beacons before the next DTIM, for beaconing, 293 * valid in station mode only if after the driver was notified 294 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 295 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 296 * as it may have been received during scanning long ago). If the 297 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 298 * only come from a beacon, but might not become valid until after 299 * association when a beacon is received (which is notified with the 300 * %BSS_CHANGED_DTIM flag.) 301 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 302 * the driver/device can use this to calculate synchronisation 303 * (see @sync_tsf) 304 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 305 * is requested, see @sync_tsf/@sync_device_ts. 306 * @beacon_int: beacon interval 307 * @assoc_capability: capabilities taken from assoc resp 308 * @basic_rates: bitmap of basic rates, each bit stands for an 309 * index into the rate table configured by the driver in 310 * the current band. 311 * @beacon_rate: associated AP's beacon TX rate 312 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 313 * @bssid: The BSSID for this BSS 314 * @enable_beacon: whether beaconing should be enabled or not 315 * @chandef: Channel definition for this BSS -- the hardware might be 316 * configured a higher bandwidth than this BSS uses, for example. 317 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 318 * This field is only valid when the channel type is one of the HT types. 319 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 320 * implies disabled 321 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 322 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 323 * may filter ARP queries targeted for other addresses than listed here. 324 * The driver must allow ARP queries targeted for all address listed here 325 * to pass through. An empty list implies no ARP queries need to pass. 326 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 327 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 328 * array size), it's up to the driver what to do in that case. 329 * @qos: This is a QoS-enabled BSS. 330 * @idle: This interface is idle. There's also a global idle flag in the 331 * hardware config which may be more appropriate depending on what 332 * your driver/device needs to do. 333 * @ps: power-save mode (STA only). This flag is NOT affected by 334 * offchannel/dynamic_ps operations. 335 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 336 * @ssid_len: Length of SSID given in @ssid. 337 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 338 * @txpower: TX power in dBm 339 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 340 */ 341struct ieee80211_bss_conf { 342 const u8 *bssid; 343 /* association related data */ 344 bool assoc, ibss_joined; 345 bool ibss_creator; 346 u16 aid; 347 /* erp related data */ 348 bool use_cts_prot; 349 bool use_short_preamble; 350 bool use_short_slot; 351 bool enable_beacon; 352 u8 dtim_period; 353 u16 beacon_int; 354 u16 assoc_capability; 355 u64 sync_tsf; 356 u32 sync_device_ts; 357 u8 sync_dtim_count; 358 u32 basic_rates; 359 struct ieee80211_rate *beacon_rate; 360 int mcast_rate[IEEE80211_NUM_BANDS]; 361 u16 ht_operation_mode; 362 s32 cqm_rssi_thold; 363 u32 cqm_rssi_hyst; 364 struct cfg80211_chan_def chandef; 365 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 366 int arp_addr_cnt; 367 bool qos; 368 bool idle; 369 bool ps; 370 u8 ssid[IEEE80211_MAX_SSID_LEN]; 371 size_t ssid_len; 372 bool hidden_ssid; 373 int txpower; 374 struct ieee80211_p2p_noa_attr p2p_noa_attr; 375}; 376 377/** 378 * enum mac80211_tx_info_flags - flags to describe transmission information/status 379 * 380 * These flags are used with the @flags member of &ieee80211_tx_info. 381 * 382 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 383 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 384 * number to this frame, taking care of not overwriting the fragment 385 * number and increasing the sequence number only when the 386 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 387 * assign sequence numbers to QoS-data frames but cannot do so correctly 388 * for non-QoS-data and management frames because beacons need them from 389 * that counter as well and mac80211 cannot guarantee proper sequencing. 390 * If this flag is set, the driver should instruct the hardware to 391 * assign a sequence number to the frame or assign one itself. Cf. IEEE 392 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 393 * beacons and always be clear for frames without a sequence number field. 394 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 395 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 396 * station 397 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 398 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 399 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 400 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 401 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 402 * because the destination STA was in powersave mode. Note that to 403 * avoid race conditions, the filter must be set by the hardware or 404 * firmware upon receiving a frame that indicates that the station 405 * went to sleep (must be done on device to filter frames already on 406 * the queue) and may only be unset after mac80211 gives the OK for 407 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 408 * since only then is it guaranteed that no more frames are in the 409 * hardware queue. 410 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 411 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 412 * is for the whole aggregation. 413 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 414 * so consider using block ack request (BAR). 415 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 416 * set by rate control algorithms to indicate probe rate, will 417 * be cleared for fragmented frames (except on the last fragment) 418 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 419 * that a frame can be transmitted while the queues are stopped for 420 * off-channel operation. 421 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 422 * used to indicate that a pending frame requires TX processing before 423 * it can be sent out. 424 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 425 * used to indicate that a frame was already retried due to PS 426 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 427 * used to indicate frame should not be encrypted 428 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 429 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 430 * be sent although the station is in powersave mode. 431 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 432 * transmit function after the current frame, this can be used 433 * by drivers to kick the DMA queue only if unset or when the 434 * queue gets full. 435 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 436 * after TX status because the destination was asleep, it must not 437 * be modified again (no seqno assignment, crypto, etc.) 438 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 439 * code for connection establishment, this indicates that its status 440 * should kick the MLME state machine. 441 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 442 * MLME command (internal to mac80211 to figure out whether to send TX 443 * status to user space) 444 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 445 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 446 * frame and selects the maximum number of streams that it can use. 447 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 448 * the off-channel channel when a remain-on-channel offload is done 449 * in hardware -- normal packets still flow and are expected to be 450 * handled properly by the device. 451 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 452 * testing. It will be sent out with incorrect Michael MIC key to allow 453 * TKIP countermeasures to be tested. 454 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 455 * This flag is actually used for management frame especially for P2P 456 * frames not being sent at CCK rate in 2GHz band. 457 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 458 * when its status is reported the service period ends. For frames in 459 * an SP that mac80211 transmits, it is already set; for driver frames 460 * the driver may set this flag. It is also used to do the same for 461 * PS-Poll responses. 462 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 463 * This flag is used to send nullfunc frame at minimum rate when 464 * the nullfunc is used for connection monitoring purpose. 465 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 466 * would be fragmented by size (this is optional, only used for 467 * monitor injection). 468 * @IEEE80211_TX_CTL_PS_RESPONSE: This frame is a response to a poll 469 * frame (PS-Poll or uAPSD). 470 * 471 * Note: If you have to add new flags to the enumeration, then don't 472 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 473 */ 474enum mac80211_tx_info_flags { 475 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 476 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 477 IEEE80211_TX_CTL_NO_ACK = BIT(2), 478 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 479 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 480 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 481 IEEE80211_TX_CTL_AMPDU = BIT(6), 482 IEEE80211_TX_CTL_INJECTED = BIT(7), 483 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 484 IEEE80211_TX_STAT_ACK = BIT(9), 485 IEEE80211_TX_STAT_AMPDU = BIT(10), 486 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 487 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 488 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 489 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 490 IEEE80211_TX_INTFL_RETRIED = BIT(15), 491 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 492 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 493 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 494 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 495 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 496 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 497 IEEE80211_TX_CTL_LDPC = BIT(22), 498 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 499 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 500 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 501 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 502 IEEE80211_TX_STATUS_EOSP = BIT(28), 503 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 504 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 505 IEEE80211_TX_CTL_PS_RESPONSE = BIT(31), 506}; 507 508#define IEEE80211_TX_CTL_STBC_SHIFT 23 509 510/** 511 * enum mac80211_tx_control_flags - flags to describe transmit control 512 * 513 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 514 * protocol frame (e.g. EAP) 515 * 516 * These flags are used in tx_info->control.flags. 517 */ 518enum mac80211_tx_control_flags { 519 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 520}; 521 522/* 523 * This definition is used as a mask to clear all temporary flags, which are 524 * set by the tx handlers for each transmission attempt by the mac80211 stack. 525 */ 526#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 527 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 528 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 529 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 530 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 531 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 532 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 533 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 534 535/** 536 * enum mac80211_rate_control_flags - per-rate flags set by the 537 * Rate Control algorithm. 538 * 539 * These flags are set by the Rate control algorithm for each rate during tx, 540 * in the @flags member of struct ieee80211_tx_rate. 541 * 542 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 543 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 544 * This is set if the current BSS requires ERP protection. 545 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 546 * @IEEE80211_TX_RC_MCS: HT rate. 547 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 548 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 549 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 550 * Greenfield mode. 551 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 552 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 553 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 554 * (80+80 isn't supported yet) 555 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 556 * adjacent 20 MHz channels, if the current channel type is 557 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 558 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 559 */ 560enum mac80211_rate_control_flags { 561 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 562 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 563 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 564 565 /* rate index is an HT/VHT MCS instead of an index */ 566 IEEE80211_TX_RC_MCS = BIT(3), 567 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 568 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 569 IEEE80211_TX_RC_DUP_DATA = BIT(6), 570 IEEE80211_TX_RC_SHORT_GI = BIT(7), 571 IEEE80211_TX_RC_VHT_MCS = BIT(8), 572 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 573 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 574}; 575 576 577/* there are 40 bytes if you don't need the rateset to be kept */ 578#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 579 580/* if you do need the rateset, then you have less space */ 581#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 582 583/* maximum number of rate stages */ 584#define IEEE80211_TX_MAX_RATES 4 585 586/* maximum number of rate table entries */ 587#define IEEE80211_TX_RATE_TABLE_SIZE 4 588 589/** 590 * struct ieee80211_tx_rate - rate selection/status 591 * 592 * @idx: rate index to attempt to send with 593 * @flags: rate control flags (&enum mac80211_rate_control_flags) 594 * @count: number of tries in this rate before going to the next rate 595 * 596 * A value of -1 for @idx indicates an invalid rate and, if used 597 * in an array of retry rates, that no more rates should be tried. 598 * 599 * When used for transmit status reporting, the driver should 600 * always report the rate along with the flags it used. 601 * 602 * &struct ieee80211_tx_info contains an array of these structs 603 * in the control information, and it will be filled by the rate 604 * control algorithm according to what should be sent. For example, 605 * if this array contains, in the format { <idx>, <count> } the 606 * information 607 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 608 * then this means that the frame should be transmitted 609 * up to twice at rate 3, up to twice at rate 2, and up to four 610 * times at rate 1 if it doesn't get acknowledged. Say it gets 611 * acknowledged by the peer after the fifth attempt, the status 612 * information should then contain 613 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 614 * since it was transmitted twice at rate 3, twice at rate 2 615 * and once at rate 1 after which we received an acknowledgement. 616 */ 617struct ieee80211_tx_rate { 618 s8 idx; 619 u16 count:5, 620 flags:11; 621} __packed; 622 623#define IEEE80211_MAX_TX_RETRY 31 624 625static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 626 u8 mcs, u8 nss) 627{ 628 WARN_ON(mcs & ~0xF); 629 WARN_ON((nss - 1) & ~0x7); 630 rate->idx = ((nss - 1) << 4) | mcs; 631} 632 633static inline u8 634ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 635{ 636 return rate->idx & 0xF; 637} 638 639static inline u8 640ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 641{ 642 return (rate->idx >> 4) + 1; 643} 644 645/** 646 * struct ieee80211_tx_info - skb transmit information 647 * 648 * This structure is placed in skb->cb for three uses: 649 * (1) mac80211 TX control - mac80211 tells the driver what to do 650 * (2) driver internal use (if applicable) 651 * (3) TX status information - driver tells mac80211 what happened 652 * 653 * @flags: transmit info flags, defined above 654 * @band: the band to transmit on (use for checking for races) 655 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 656 * @ack_frame_id: internal frame ID for TX status, used internally 657 * @control: union for control data 658 * @status: union for status data 659 * @driver_data: array of driver_data pointers 660 * @ampdu_ack_len: number of acked aggregated frames. 661 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 662 * @ampdu_len: number of aggregated frames. 663 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 664 * @ack_signal: signal strength of the ACK frame 665 */ 666struct ieee80211_tx_info { 667 /* common information */ 668 u32 flags; 669 u8 band; 670 671 u8 hw_queue; 672 673 u16 ack_frame_id; 674 675 union { 676 struct { 677 union { 678 /* rate control */ 679 struct { 680 struct ieee80211_tx_rate rates[ 681 IEEE80211_TX_MAX_RATES]; 682 s8 rts_cts_rate_idx; 683 u8 use_rts:1; 684 u8 use_cts_prot:1; 685 u8 short_preamble:1; 686 u8 skip_table:1; 687 /* 2 bytes free */ 688 }; 689 /* only needed before rate control */ 690 unsigned long jiffies; 691 }; 692 /* NB: vif can be NULL for injected frames */ 693 struct ieee80211_vif *vif; 694 struct ieee80211_key_conf *hw_key; 695 u32 flags; 696 /* 4 bytes free */ 697 } control; 698 struct { 699 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 700 int ack_signal; 701 u8 ampdu_ack_len; 702 u8 ampdu_len; 703 u8 antenna; 704 /* 21 bytes free */ 705 } status; 706 struct { 707 struct ieee80211_tx_rate driver_rates[ 708 IEEE80211_TX_MAX_RATES]; 709 u8 pad[4]; 710 711 void *rate_driver_data[ 712 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 713 }; 714 void *driver_data[ 715 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 716 }; 717}; 718 719/** 720 * struct ieee80211_sched_scan_ies - scheduled scan IEs 721 * 722 * This structure is used to pass the appropriate IEs to be used in scheduled 723 * scans for all bands. It contains both the IEs passed from the userspace 724 * and the ones generated by mac80211. 725 * 726 * @ie: array with the IEs for each supported band 727 * @len: array with the total length of the IEs for each band 728 */ 729struct ieee80211_sched_scan_ies { 730 u8 *ie[IEEE80211_NUM_BANDS]; 731 size_t len[IEEE80211_NUM_BANDS]; 732}; 733 734static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 735{ 736 return (struct ieee80211_tx_info *)skb->cb; 737} 738 739static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 740{ 741 return (struct ieee80211_rx_status *)skb->cb; 742} 743 744/** 745 * ieee80211_tx_info_clear_status - clear TX status 746 * 747 * @info: The &struct ieee80211_tx_info to be cleared. 748 * 749 * When the driver passes an skb back to mac80211, it must report 750 * a number of things in TX status. This function clears everything 751 * in the TX status but the rate control information (it does clear 752 * the count since you need to fill that in anyway). 753 * 754 * NOTE: You can only use this function if you do NOT use 755 * info->driver_data! Use info->rate_driver_data 756 * instead if you need only the less space that allows. 757 */ 758static inline void 759ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 760{ 761 int i; 762 763 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 764 offsetof(struct ieee80211_tx_info, control.rates)); 765 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 766 offsetof(struct ieee80211_tx_info, driver_rates)); 767 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 768 /* clear the rate counts */ 769 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 770 info->status.rates[i].count = 0; 771 772 BUILD_BUG_ON( 773 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 774 memset(&info->status.ampdu_ack_len, 0, 775 sizeof(struct ieee80211_tx_info) - 776 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 777} 778 779 780/** 781 * enum mac80211_rx_flags - receive flags 782 * 783 * These flags are used with the @flag member of &struct ieee80211_rx_status. 784 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 785 * Use together with %RX_FLAG_MMIC_STRIPPED. 786 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 787 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 788 * verification has been done by the hardware. 789 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 790 * If this flag is set, the stack cannot do any replay detection 791 * hence the driver or hardware will have to do that. 792 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 793 * the frame. 794 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 795 * the frame. 796 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 797 * field) is valid and contains the time the first symbol of the MPDU 798 * was received. This is useful in monitor mode and for proper IBSS 799 * merging. 800 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 801 * field) is valid and contains the time the last symbol of the MPDU 802 * (including FCS) was received. 803 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 804 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 805 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 806 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 807 * @RX_FLAG_SHORT_GI: Short guard interval was used 808 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 809 * Valid only for data frames (mainly A-MPDU) 810 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 811 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 812 * to hw.radiotap_mcs_details to advertise that fact 813 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 814 * number (@ampdu_reference) must be populated and be a distinct number for 815 * each A-MPDU 816 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 817 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 818 * monitoring purposes only 819 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 820 * subframes of a single A-MPDU 821 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 822 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 823 * on this subframe 824 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 825 * is stored in the @ampdu_delimiter_crc field) 826 * @RX_FLAG_LDPC: LDPC was used 827 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 828 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 829 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 830 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 831 * subframes instead of a one huge frame for performance reasons. 832 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 833 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 834 * the 3rd (last) one must not have this flag set. The flag is used to 835 * deal with retransmission/duplication recovery properly since A-MSDU 836 * subframes share the same sequence number. Reported subframes can be 837 * either regular MSDU or singly A-MSDUs. Subframes must not be 838 * interleaved with other frames. 839 */ 840enum mac80211_rx_flags { 841 RX_FLAG_MMIC_ERROR = BIT(0), 842 RX_FLAG_DECRYPTED = BIT(1), 843 RX_FLAG_MMIC_STRIPPED = BIT(3), 844 RX_FLAG_IV_STRIPPED = BIT(4), 845 RX_FLAG_FAILED_FCS_CRC = BIT(5), 846 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 847 RX_FLAG_MACTIME_START = BIT(7), 848 RX_FLAG_SHORTPRE = BIT(8), 849 RX_FLAG_HT = BIT(9), 850 RX_FLAG_40MHZ = BIT(10), 851 RX_FLAG_SHORT_GI = BIT(11), 852 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 853 RX_FLAG_HT_GF = BIT(13), 854 RX_FLAG_AMPDU_DETAILS = BIT(14), 855 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 856 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 857 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 858 RX_FLAG_AMPDU_IS_LAST = BIT(18), 859 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 860 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 861 RX_FLAG_MACTIME_END = BIT(21), 862 RX_FLAG_VHT = BIT(22), 863 RX_FLAG_LDPC = BIT(23), 864 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 865 RX_FLAG_10MHZ = BIT(28), 866 RX_FLAG_5MHZ = BIT(29), 867 RX_FLAG_AMSDU_MORE = BIT(30), 868}; 869 870#define RX_FLAG_STBC_SHIFT 26 871 872/** 873 * enum mac80211_rx_vht_flags - receive VHT flags 874 * 875 * These flags are used with the @vht_flag member of 876 * &struct ieee80211_rx_status. 877 * @RX_VHT_FLAG_80MHZ: 80 MHz was used 878 * @RX_VHT_FLAG_80P80MHZ: 80+80 MHz was used 879 * @RX_VHT_FLAG_160MHZ: 160 MHz was used 880 */ 881enum mac80211_rx_vht_flags { 882 RX_VHT_FLAG_80MHZ = BIT(0), 883 RX_VHT_FLAG_80P80MHZ = BIT(1), 884 RX_VHT_FLAG_160MHZ = BIT(2), 885}; 886 887/** 888 * struct ieee80211_rx_status - receive status 889 * 890 * The low-level driver should provide this information (the subset 891 * supported by hardware) to the 802.11 code with each received 892 * frame, in the skb's control buffer (cb). 893 * 894 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 895 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 896 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 897 * it but can store it and pass it back to the driver for synchronisation 898 * @band: the active band when this frame was received 899 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 900 * @signal: signal strength when receiving this frame, either in dBm, in dB or 901 * unspecified depending on the hardware capabilities flags 902 * @IEEE80211_HW_SIGNAL_* 903 * @chains: bitmask of receive chains for which separate signal strength 904 * values were filled. 905 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 906 * support dB or unspecified units) 907 * @antenna: antenna used 908 * @rate_idx: index of data rate into band's supported rates or MCS index if 909 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 910 * @vht_nss: number of streams (VHT only) 911 * @flag: %RX_FLAG_* 912 * @vht_flag: %RX_VHT_FLAG_* 913 * @rx_flags: internal RX flags for mac80211 914 * @ampdu_reference: A-MPDU reference number, must be a different value for 915 * each A-MPDU but the same for each subframe within one A-MPDU 916 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 917 */ 918struct ieee80211_rx_status { 919 u64 mactime; 920 u32 device_timestamp; 921 u32 ampdu_reference; 922 u32 flag; 923 u16 freq; 924 u8 vht_flag; 925 u8 rate_idx; 926 u8 vht_nss; 927 u8 rx_flags; 928 u8 band; 929 u8 antenna; 930 s8 signal; 931 u8 chains; 932 s8 chain_signal[IEEE80211_MAX_CHAINS]; 933 u8 ampdu_delimiter_crc; 934}; 935 936/** 937 * enum ieee80211_conf_flags - configuration flags 938 * 939 * Flags to define PHY configuration options 940 * 941 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 942 * to determine for example whether to calculate timestamps for packets 943 * or not, do not use instead of filter flags! 944 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 945 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 946 * meaning that the hardware still wakes up for beacons, is able to 947 * transmit frames and receive the possible acknowledgment frames. 948 * Not to be confused with hardware specific wakeup/sleep states, 949 * driver is responsible for that. See the section "Powersave support" 950 * for more. 951 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 952 * the driver should be prepared to handle configuration requests but 953 * may turn the device off as much as possible. Typically, this flag will 954 * be set when an interface is set UP but not associated or scanning, but 955 * it can also be unset in that case when monitor interfaces are active. 956 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 957 * operating channel. 958 */ 959enum ieee80211_conf_flags { 960 IEEE80211_CONF_MONITOR = (1<<0), 961 IEEE80211_CONF_PS = (1<<1), 962 IEEE80211_CONF_IDLE = (1<<2), 963 IEEE80211_CONF_OFFCHANNEL = (1<<3), 964}; 965 966 967/** 968 * enum ieee80211_conf_changed - denotes which configuration changed 969 * 970 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 971 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 972 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 973 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 974 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 975 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 976 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 977 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 978 * Note that this is only valid if channel contexts are not used, 979 * otherwise each channel context has the number of chains listed. 980 */ 981enum ieee80211_conf_changed { 982 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 983 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 984 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 985 IEEE80211_CONF_CHANGE_PS = BIT(4), 986 IEEE80211_CONF_CHANGE_POWER = BIT(5), 987 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 988 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 989 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 990}; 991 992/** 993 * enum ieee80211_smps_mode - spatial multiplexing power save mode 994 * 995 * @IEEE80211_SMPS_AUTOMATIC: automatic 996 * @IEEE80211_SMPS_OFF: off 997 * @IEEE80211_SMPS_STATIC: static 998 * @IEEE80211_SMPS_DYNAMIC: dynamic 999 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1000 */ 1001enum ieee80211_smps_mode { 1002 IEEE80211_SMPS_AUTOMATIC, 1003 IEEE80211_SMPS_OFF, 1004 IEEE80211_SMPS_STATIC, 1005 IEEE80211_SMPS_DYNAMIC, 1006 1007 /* keep last */ 1008 IEEE80211_SMPS_NUM_MODES, 1009}; 1010 1011/** 1012 * struct ieee80211_conf - configuration of the device 1013 * 1014 * This struct indicates how the driver shall configure the hardware. 1015 * 1016 * @flags: configuration flags defined above 1017 * 1018 * @listen_interval: listen interval in units of beacon interval 1019 * @max_sleep_period: the maximum number of beacon intervals to sleep for 1020 * before checking the beacon for a TIM bit (managed mode only); this 1021 * value will be only achievable between DTIM frames, the hardware 1022 * needs to check for the multicast traffic bit in DTIM beacons. 1023 * This variable is valid only when the CONF_PS flag is set. 1024 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1025 * in power saving. Power saving will not be enabled until a beacon 1026 * has been received and the DTIM period is known. 1027 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1028 * powersave documentation below. This variable is valid only when 1029 * the CONF_PS flag is set. 1030 * 1031 * @power_level: requested transmit power (in dBm), backward compatibility 1032 * value only that is set to the minimum of all interfaces 1033 * 1034 * @chandef: the channel definition to tune to 1035 * @radar_enabled: whether radar detection is enabled 1036 * 1037 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1038 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1039 * but actually means the number of transmissions not the number of retries 1040 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1041 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1042 * number of transmissions not the number of retries 1043 * 1044 * @smps_mode: spatial multiplexing powersave mode; note that 1045 * %IEEE80211_SMPS_STATIC is used when the device is not 1046 * configured for an HT channel. 1047 * Note that this is only valid if channel contexts are not used, 1048 * otherwise each channel context has the number of chains listed. 1049 */ 1050struct ieee80211_conf { 1051 u32 flags; 1052 int power_level, dynamic_ps_timeout; 1053 int max_sleep_period; 1054 1055 u16 listen_interval; 1056 u8 ps_dtim_period; 1057 1058 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1059 1060 struct cfg80211_chan_def chandef; 1061 bool radar_enabled; 1062 enum ieee80211_smps_mode smps_mode; 1063}; 1064 1065/** 1066 * struct ieee80211_channel_switch - holds the channel switch data 1067 * 1068 * The information provided in this structure is required for channel switch 1069 * operation. 1070 * 1071 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1072 * Function (TSF) timer when the frame containing the channel switch 1073 * announcement was received. This is simply the rx.mactime parameter 1074 * the driver passed into mac80211. 1075 * @block_tx: Indicates whether transmission must be blocked before the 1076 * scheduled channel switch, as indicated by the AP. 1077 * @chandef: the new channel to switch to 1078 * @count: the number of TBTT's until the channel switch event 1079 */ 1080struct ieee80211_channel_switch { 1081 u64 timestamp; 1082 bool block_tx; 1083 struct cfg80211_chan_def chandef; 1084 u8 count; 1085}; 1086 1087/** 1088 * enum ieee80211_vif_flags - virtual interface flags 1089 * 1090 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1091 * on this virtual interface to avoid unnecessary CPU wakeups 1092 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1093 * monitoring on this virtual interface -- i.e. it can monitor 1094 * connection quality related parameters, such as the RSSI level and 1095 * provide notifications if configured trigger levels are reached. 1096 */ 1097enum ieee80211_vif_flags { 1098 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1099 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1100}; 1101 1102/** 1103 * struct ieee80211_vif - per-interface data 1104 * 1105 * Data in this structure is continually present for driver 1106 * use during the life of a virtual interface. 1107 * 1108 * @type: type of this virtual interface 1109 * @bss_conf: BSS configuration for this interface, either our own 1110 * or the BSS we're associated to 1111 * @addr: address of this interface 1112 * @p2p: indicates whether this AP or STA interface is a p2p 1113 * interface, i.e. a GO or p2p-sta respectively 1114 * @csa_active: marks whether a channel switch is going on 1115 * @driver_flags: flags/capabilities the driver has for this interface, 1116 * these need to be set (or cleared) when the interface is added 1117 * or, if supported by the driver, the interface type is changed 1118 * at runtime, mac80211 will never touch this field 1119 * @hw_queue: hardware queue for each AC 1120 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1121 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1122 * when it is not assigned. This pointer is RCU-protected due to the TX 1123 * path needing to access it; even though the netdev carrier will always 1124 * be off when it is %NULL there can still be races and packets could be 1125 * processed after it switches back to %NULL. 1126 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1127 * interface debug files. Note that it will be NULL for the virtual 1128 * monitor interface (if that is requested.) 1129 * @drv_priv: data area for driver use, will always be aligned to 1130 * sizeof(void *). 1131 */ 1132struct ieee80211_vif { 1133 enum nl80211_iftype type; 1134 struct ieee80211_bss_conf bss_conf; 1135 u8 addr[ETH_ALEN]; 1136 bool p2p; 1137 bool csa_active; 1138 1139 u8 cab_queue; 1140 u8 hw_queue[IEEE80211_NUM_ACS]; 1141 1142 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1143 1144 u32 driver_flags; 1145 1146#ifdef CONFIG_MAC80211_DEBUGFS 1147 struct dentry *debugfs_dir; 1148#endif 1149 1150 /* must be last */ 1151 u8 drv_priv[0] __aligned(sizeof(void *)); 1152}; 1153 1154static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1155{ 1156#ifdef CONFIG_MAC80211_MESH 1157 return vif->type == NL80211_IFTYPE_MESH_POINT; 1158#endif 1159 return false; 1160} 1161 1162/** 1163 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1164 * @wdev: the wdev to get the vif for 1165 * 1166 * This can be used by mac80211 drivers with direct cfg80211 APIs 1167 * (like the vendor commands) that get a wdev. 1168 * 1169 * Note that this function may return %NULL if the given wdev isn't 1170 * associated with a vif that the driver knows about (e.g. monitor 1171 * or AP_VLAN interfaces.) 1172 */ 1173struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1174 1175/** 1176 * enum ieee80211_key_flags - key flags 1177 * 1178 * These flags are used for communication about keys between the driver 1179 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1180 * 1181 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1182 * driver to indicate that it requires IV generation for this 1183 * particular key. 1184 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1185 * the driver for a TKIP key if it requires Michael MIC 1186 * generation in software. 1187 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1188 * that the key is pairwise rather then a shared key. 1189 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1190 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1191 * be done in software. 1192 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1193 * if space should be prepared for the IV, but the IV 1194 * itself should not be generated. Do not set together with 1195 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1196 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1197 * management frames. The flag can help drivers that have a hardware 1198 * crypto implementation that doesn't deal with management frames 1199 * properly by allowing them to not upload the keys to hardware and 1200 * fall back to software crypto. Note that this flag deals only with 1201 * RX, if your crypto engine can't deal with TX you can also set the 1202 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1203 */ 1204enum ieee80211_key_flags { 1205 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1206 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1207 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1208 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1209 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1210 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1211}; 1212 1213/** 1214 * struct ieee80211_key_conf - key information 1215 * 1216 * This key information is given by mac80211 to the driver by 1217 * the set_key() callback in &struct ieee80211_ops. 1218 * 1219 * @hw_key_idx: To be set by the driver, this is the key index the driver 1220 * wants to be given when a frame is transmitted and needs to be 1221 * encrypted in hardware. 1222 * @cipher: The key's cipher suite selector. 1223 * @flags: key flags, see &enum ieee80211_key_flags. 1224 * @keyidx: the key index (0-3) 1225 * @keylen: key material length 1226 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1227 * data block: 1228 * - Temporal Encryption Key (128 bits) 1229 * - Temporal Authenticator Tx MIC Key (64 bits) 1230 * - Temporal Authenticator Rx MIC Key (64 bits) 1231 * @icv_len: The ICV length for this key type 1232 * @iv_len: The IV length for this key type 1233 */ 1234struct ieee80211_key_conf { 1235 u32 cipher; 1236 u8 icv_len; 1237 u8 iv_len; 1238 u8 hw_key_idx; 1239 u8 flags; 1240 s8 keyidx; 1241 u8 keylen; 1242 u8 key[0]; 1243}; 1244 1245/** 1246 * struct ieee80211_cipher_scheme - cipher scheme 1247 * 1248 * This structure contains a cipher scheme information defining 1249 * the secure packet crypto handling. 1250 * 1251 * @cipher: a cipher suite selector 1252 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1253 * @hdr_len: a length of a security header used the cipher 1254 * @pn_len: a length of a packet number in the security header 1255 * @pn_off: an offset of pn from the beginning of the security header 1256 * @key_idx_off: an offset of key index byte in the security header 1257 * @key_idx_mask: a bit mask of key_idx bits 1258 * @key_idx_shift: a bit shift needed to get key_idx 1259 * key_idx value calculation: 1260 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1261 * @mic_len: a mic length in bytes 1262 */ 1263struct ieee80211_cipher_scheme { 1264 u32 cipher; 1265 u16 iftype; 1266 u8 hdr_len; 1267 u8 pn_len; 1268 u8 pn_off; 1269 u8 key_idx_off; 1270 u8 key_idx_mask; 1271 u8 key_idx_shift; 1272 u8 mic_len; 1273}; 1274 1275/** 1276 * enum set_key_cmd - key command 1277 * 1278 * Used with the set_key() callback in &struct ieee80211_ops, this 1279 * indicates whether a key is being removed or added. 1280 * 1281 * @SET_KEY: a key is set 1282 * @DISABLE_KEY: a key must be disabled 1283 */ 1284enum set_key_cmd { 1285 SET_KEY, DISABLE_KEY, 1286}; 1287 1288/** 1289 * enum ieee80211_sta_state - station state 1290 * 1291 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1292 * this is a special state for add/remove transitions 1293 * @IEEE80211_STA_NONE: station exists without special state 1294 * @IEEE80211_STA_AUTH: station is authenticated 1295 * @IEEE80211_STA_ASSOC: station is associated 1296 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1297 */ 1298enum ieee80211_sta_state { 1299 /* NOTE: These need to be ordered correctly! */ 1300 IEEE80211_STA_NOTEXIST, 1301 IEEE80211_STA_NONE, 1302 IEEE80211_STA_AUTH, 1303 IEEE80211_STA_ASSOC, 1304 IEEE80211_STA_AUTHORIZED, 1305}; 1306 1307/** 1308 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1309 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1310 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1311 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1312 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1313 * (including 80+80 MHz) 1314 * 1315 * Implementation note: 20 must be zero to be initialized 1316 * correctly, the values must be sorted. 1317 */ 1318enum ieee80211_sta_rx_bandwidth { 1319 IEEE80211_STA_RX_BW_20 = 0, 1320 IEEE80211_STA_RX_BW_40, 1321 IEEE80211_STA_RX_BW_80, 1322 IEEE80211_STA_RX_BW_160, 1323}; 1324 1325/** 1326 * struct ieee80211_sta_rates - station rate selection table 1327 * 1328 * @rcu_head: RCU head used for freeing the table on update 1329 * @rate: transmit rates/flags to be used by default. 1330 * Overriding entries per-packet is possible by using cb tx control. 1331 */ 1332struct ieee80211_sta_rates { 1333 struct rcu_head rcu_head; 1334 struct { 1335 s8 idx; 1336 u8 count; 1337 u8 count_cts; 1338 u8 count_rts; 1339 u16 flags; 1340 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1341}; 1342 1343/** 1344 * struct ieee80211_sta - station table entry 1345 * 1346 * A station table entry represents a station we are possibly 1347 * communicating with. Since stations are RCU-managed in 1348 * mac80211, any ieee80211_sta pointer you get access to must 1349 * either be protected by rcu_read_lock() explicitly or implicitly, 1350 * or you must take good care to not use such a pointer after a 1351 * call to your sta_remove callback that removed it. 1352 * 1353 * @addr: MAC address 1354 * @aid: AID we assigned to the station if we're an AP 1355 * @supp_rates: Bitmap of supported rates (per band) 1356 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1357 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1358 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1359 * @drv_priv: data area for driver use, will always be aligned to 1360 * sizeof(void *), size is determined in hw information. 1361 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1362 * if wme is supported. 1363 * @max_sp: max Service Period. Only valid if wme is supported. 1364 * @bandwidth: current bandwidth the station can receive with 1365 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1366 * station can receive at the moment, changed by operating mode 1367 * notifications and capabilities. The value is only valid after 1368 * the station moves to associated state. 1369 * @smps_mode: current SMPS mode (off, static or dynamic) 1370 * @rates: rate control selection table 1371 */ 1372struct ieee80211_sta { 1373 u32 supp_rates[IEEE80211_NUM_BANDS]; 1374 u8 addr[ETH_ALEN]; 1375 u16 aid; 1376 struct ieee80211_sta_ht_cap ht_cap; 1377 struct ieee80211_sta_vht_cap vht_cap; 1378 bool wme; 1379 u8 uapsd_queues; 1380 u8 max_sp; 1381 u8 rx_nss; 1382 enum ieee80211_sta_rx_bandwidth bandwidth; 1383 enum ieee80211_smps_mode smps_mode; 1384 struct ieee80211_sta_rates __rcu *rates; 1385 1386 /* must be last */ 1387 u8 drv_priv[0] __aligned(sizeof(void *)); 1388}; 1389 1390/** 1391 * enum sta_notify_cmd - sta notify command 1392 * 1393 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1394 * indicates if an associated station made a power state transition. 1395 * 1396 * @STA_NOTIFY_SLEEP: a station is now sleeping 1397 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1398 */ 1399enum sta_notify_cmd { 1400 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1401}; 1402 1403/** 1404 * struct ieee80211_tx_control - TX control data 1405 * 1406 * @sta: station table entry, this sta pointer may be NULL and 1407 * it is not allowed to copy the pointer, due to RCU. 1408 */ 1409struct ieee80211_tx_control { 1410 struct ieee80211_sta *sta; 1411}; 1412 1413/** 1414 * enum ieee80211_hw_flags - hardware flags 1415 * 1416 * These flags are used to indicate hardware capabilities to 1417 * the stack. Generally, flags here should have their meaning 1418 * done in a way that the simplest hardware doesn't need setting 1419 * any particular flags. There are some exceptions to this rule, 1420 * however, so you are advised to review these flags carefully. 1421 * 1422 * @IEEE80211_HW_HAS_RATE_CONTROL: 1423 * The hardware or firmware includes rate control, and cannot be 1424 * controlled by the stack. As such, no rate control algorithm 1425 * should be instantiated, and the TX rate reported to userspace 1426 * will be taken from the TX status instead of the rate control 1427 * algorithm. 1428 * Note that this requires that the driver implement a number of 1429 * callbacks so it has the correct information, it needs to have 1430 * the @set_rts_threshold callback and must look at the BSS config 1431 * @use_cts_prot for G/N protection, @use_short_slot for slot 1432 * timing in 2.4 GHz and @use_short_preamble for preambles for 1433 * CCK frames. 1434 * 1435 * @IEEE80211_HW_RX_INCLUDES_FCS: 1436 * Indicates that received frames passed to the stack include 1437 * the FCS at the end. 1438 * 1439 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1440 * Some wireless LAN chipsets buffer broadcast/multicast frames 1441 * for power saving stations in the hardware/firmware and others 1442 * rely on the host system for such buffering. This option is used 1443 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1444 * multicast frames when there are power saving stations so that 1445 * the driver can fetch them with ieee80211_get_buffered_bc(). 1446 * 1447 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1448 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1449 * 1450 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1451 * Hardware is not capable of receiving frames with short preamble on 1452 * the 2.4 GHz band. 1453 * 1454 * @IEEE80211_HW_SIGNAL_UNSPEC: 1455 * Hardware can provide signal values but we don't know its units. We 1456 * expect values between 0 and @max_signal. 1457 * If possible please provide dB or dBm instead. 1458 * 1459 * @IEEE80211_HW_SIGNAL_DBM: 1460 * Hardware gives signal values in dBm, decibel difference from 1461 * one milliwatt. This is the preferred method since it is standardized 1462 * between different devices. @max_signal does not need to be set. 1463 * 1464 * @IEEE80211_HW_SPECTRUM_MGMT: 1465 * Hardware supports spectrum management defined in 802.11h 1466 * Measurement, Channel Switch, Quieting, TPC 1467 * 1468 * @IEEE80211_HW_AMPDU_AGGREGATION: 1469 * Hardware supports 11n A-MPDU aggregation. 1470 * 1471 * @IEEE80211_HW_SUPPORTS_PS: 1472 * Hardware has power save support (i.e. can go to sleep). 1473 * 1474 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1475 * Hardware requires nullfunc frame handling in stack, implies 1476 * stack support for dynamic PS. 1477 * 1478 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1479 * Hardware has support for dynamic PS. 1480 * 1481 * @IEEE80211_HW_MFP_CAPABLE: 1482 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1483 * 1484 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1485 * Hardware supports static spatial multiplexing powersave, 1486 * ie. can turn off all but one chain even on HT connections 1487 * that should be using more chains. 1488 * 1489 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1490 * Hardware supports dynamic spatial multiplexing powersave, 1491 * ie. can turn off all but one chain and then wake the rest 1492 * up as required after, for example, rts/cts handshake. 1493 * 1494 * @IEEE80211_HW_SUPPORTS_UAPSD: 1495 * Hardware supports Unscheduled Automatic Power Save Delivery 1496 * (U-APSD) in managed mode. The mode is configured with 1497 * conf_tx() operation. 1498 * 1499 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1500 * Hardware can provide ack status reports of Tx frames to 1501 * the stack. 1502 * 1503 * @IEEE80211_HW_CONNECTION_MONITOR: 1504 * The hardware performs its own connection monitoring, including 1505 * periodic keep-alives to the AP and probing the AP on beacon loss. 1506 * 1507 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1508 * This device needs to get data from beacon before association (i.e. 1509 * dtim_period). 1510 * 1511 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1512 * per-station GTKs as used by IBSS RSN or during fast transition. If 1513 * the device doesn't support per-station GTKs, but can be asked not 1514 * to decrypt group addressed frames, then IBSS RSN support is still 1515 * possible but software crypto will be used. Advertise the wiphy flag 1516 * only in that case. 1517 * 1518 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1519 * autonomously manages the PS status of connected stations. When 1520 * this flag is set mac80211 will not trigger PS mode for connected 1521 * stations based on the PM bit of incoming frames. 1522 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1523 * the PS mode of connected stations. 1524 * 1525 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1526 * setup strictly in HW. mac80211 should not attempt to do this in 1527 * software. 1528 * 1529 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1530 * a virtual monitor interface when monitor interfaces are the only 1531 * active interfaces. 1532 * 1533 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1534 * queue mapping in order to use different queues (not just one per AC) 1535 * for different virtual interfaces. See the doc section on HW queue 1536 * control for more details. 1537 * 1538 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1539 * selection table provided by the rate control algorithm. 1540 * 1541 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1542 * P2P Interface. This will be honoured even if more than one interface 1543 * is supported. 1544 * 1545 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1546 * only, to allow getting TBTT of a DTIM beacon. 1547 * 1548 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1549 * and can cope with CCK rates in an aggregation session (e.g. by not 1550 * using aggregation for such frames.) 1551 * 1552 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1553 * for a single active channel while using channel contexts. When support 1554 * is not enabled the default action is to disconnect when getting the 1555 * CSA frame. 1556 */ 1557enum ieee80211_hw_flags { 1558 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1559 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1560 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1561 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1562 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1563 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1564 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1565 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1566 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1567 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1568 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1569 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1570 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1571 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1572 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1573 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1574 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1575 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1576 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1577 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1578 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1579 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1580 IEEE80211_HW_AP_LINK_PS = 1<<22, 1581 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1582 IEEE80211_HW_SUPPORTS_RC_TABLE = 1<<24, 1583 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1584 IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26, 1585 IEEE80211_HW_SUPPORTS_HT_CCK_RATES = 1<<27, 1586 IEEE80211_HW_CHANCTX_STA_CSA = 1<<28, 1587}; 1588 1589/** 1590 * struct ieee80211_hw - hardware information and state 1591 * 1592 * This structure contains the configuration and hardware 1593 * information for an 802.11 PHY. 1594 * 1595 * @wiphy: This points to the &struct wiphy allocated for this 1596 * 802.11 PHY. You must fill in the @perm_addr and @dev 1597 * members of this structure using SET_IEEE80211_DEV() 1598 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1599 * bands (with channels, bitrates) are registered here. 1600 * 1601 * @conf: &struct ieee80211_conf, device configuration, don't use. 1602 * 1603 * @priv: pointer to private area that was allocated for driver use 1604 * along with this structure. 1605 * 1606 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1607 * 1608 * @extra_tx_headroom: headroom to reserve in each transmit skb 1609 * for use by the driver (e.g. for transmit headers.) 1610 * 1611 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 1612 * Can be used by drivers to add extra IEs. 1613 * 1614 * @max_signal: Maximum value for signal (rssi) in RX information, used 1615 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1616 * 1617 * @max_listen_interval: max listen interval in units of beacon interval 1618 * that HW supports 1619 * 1620 * @queues: number of available hardware transmit queues for 1621 * data packets. WMM/QoS requires at least four, these 1622 * queues need to have configurable access parameters. 1623 * 1624 * @rate_control_algorithm: rate control algorithm for this hardware. 1625 * If unset (NULL), the default algorithm will be used. Must be 1626 * set before calling ieee80211_register_hw(). 1627 * 1628 * @vif_data_size: size (in bytes) of the drv_priv data area 1629 * within &struct ieee80211_vif. 1630 * @sta_data_size: size (in bytes) of the drv_priv data area 1631 * within &struct ieee80211_sta. 1632 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1633 * within &struct ieee80211_chanctx_conf. 1634 * 1635 * @max_rates: maximum number of alternate rate retry stages the hw 1636 * can handle. 1637 * @max_report_rates: maximum number of alternate rate retry stages 1638 * the hw can report back. 1639 * @max_rate_tries: maximum number of tries for each stage 1640 * 1641 * @max_rx_aggregation_subframes: maximum buffer size (number of 1642 * sub-frames) to be used for A-MPDU block ack receiver 1643 * aggregation. 1644 * This is only relevant if the device has restrictions on the 1645 * number of subframes, if it relies on mac80211 to do reordering 1646 * it shouldn't be set. 1647 * 1648 * @max_tx_aggregation_subframes: maximum number of subframes in an 1649 * aggregate an HT driver will transmit, used by the peer as a 1650 * hint to size its reorder buffer. 1651 * 1652 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1653 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1654 * 1655 * @radiotap_mcs_details: lists which MCS information can the HW 1656 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1657 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1658 * adding _BW is supported today. 1659 * 1660 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1661 * the default is _GI | _BANDWIDTH. 1662 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1663 * 1664 * @netdev_features: netdev features to be set in each netdev created 1665 * from this HW. Note only HW checksum features are currently 1666 * compatible with mac80211. Other feature bits will be rejected. 1667 * 1668 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 1669 * for each access category if it is uAPSD trigger-enabled and delivery- 1670 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 1671 * Each bit corresponds to different AC. Value '1' in specific bit means 1672 * that corresponding AC is both trigger- and delivery-enabled. '0' means 1673 * neither enabled. 1674 * 1675 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 1676 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 1677 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 1678 * 1679 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 1680 * @cipher_schemes: a pointer to an array of cipher scheme definitions 1681 * supported by HW. 1682 */ 1683struct ieee80211_hw { 1684 struct ieee80211_conf conf; 1685 struct wiphy *wiphy; 1686 const char *rate_control_algorithm; 1687 void *priv; 1688 u32 flags; 1689 unsigned int extra_tx_headroom; 1690 unsigned int extra_beacon_tailroom; 1691 int vif_data_size; 1692 int sta_data_size; 1693 int chanctx_data_size; 1694 u16 queues; 1695 u16 max_listen_interval; 1696 s8 max_signal; 1697 u8 max_rates; 1698 u8 max_report_rates; 1699 u8 max_rate_tries; 1700 u8 max_rx_aggregation_subframes; 1701 u8 max_tx_aggregation_subframes; 1702 u8 offchannel_tx_hw_queue; 1703 u8 radiotap_mcs_details; 1704 u16 radiotap_vht_details; 1705 netdev_features_t netdev_features; 1706 u8 uapsd_queues; 1707 u8 uapsd_max_sp_len; 1708 u8 n_cipher_schemes; 1709 const struct ieee80211_cipher_scheme *cipher_schemes; 1710}; 1711 1712/** 1713 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1714 * 1715 * @wiphy: the &struct wiphy which we want to query 1716 * 1717 * mac80211 drivers can use this to get to their respective 1718 * &struct ieee80211_hw. Drivers wishing to get to their own private 1719 * structure can then access it via hw->priv. Note that mac802111 drivers should 1720 * not use wiphy_priv() to try to get their private driver structure as this 1721 * is already used internally by mac80211. 1722 * 1723 * Return: The mac80211 driver hw struct of @wiphy. 1724 */ 1725struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1726 1727/** 1728 * SET_IEEE80211_DEV - set device for 802.11 hardware 1729 * 1730 * @hw: the &struct ieee80211_hw to set the device for 1731 * @dev: the &struct device of this 802.11 device 1732 */ 1733static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1734{ 1735 set_wiphy_dev(hw->wiphy, dev); 1736} 1737 1738/** 1739 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1740 * 1741 * @hw: the &struct ieee80211_hw to set the MAC address for 1742 * @addr: the address to set 1743 */ 1744static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1745{ 1746 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1747} 1748 1749static inline struct ieee80211_rate * 1750ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1751 const struct ieee80211_tx_info *c) 1752{ 1753 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1754 return NULL; 1755 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1756} 1757 1758static inline struct ieee80211_rate * 1759ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1760 const struct ieee80211_tx_info *c) 1761{ 1762 if (c->control.rts_cts_rate_idx < 0) 1763 return NULL; 1764 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1765} 1766 1767static inline struct ieee80211_rate * 1768ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1769 const struct ieee80211_tx_info *c, int idx) 1770{ 1771 if (c->control.rates[idx + 1].idx < 0) 1772 return NULL; 1773 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1774} 1775 1776/** 1777 * ieee80211_free_txskb - free TX skb 1778 * @hw: the hardware 1779 * @skb: the skb 1780 * 1781 * Free a transmit skb. Use this funtion when some failure 1782 * to transmit happened and thus status cannot be reported. 1783 */ 1784void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1785 1786/** 1787 * DOC: Hardware crypto acceleration 1788 * 1789 * mac80211 is capable of taking advantage of many hardware 1790 * acceleration designs for encryption and decryption operations. 1791 * 1792 * The set_key() callback in the &struct ieee80211_ops for a given 1793 * device is called to enable hardware acceleration of encryption and 1794 * decryption. The callback takes a @sta parameter that will be NULL 1795 * for default keys or keys used for transmission only, or point to 1796 * the station information for the peer for individual keys. 1797 * Multiple transmission keys with the same key index may be used when 1798 * VLANs are configured for an access point. 1799 * 1800 * When transmitting, the TX control data will use the @hw_key_idx 1801 * selected by the driver by modifying the &struct ieee80211_key_conf 1802 * pointed to by the @key parameter to the set_key() function. 1803 * 1804 * The set_key() call for the %SET_KEY command should return 0 if 1805 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1806 * added; if you return 0 then hw_key_idx must be assigned to the 1807 * hardware key index, you are free to use the full u8 range. 1808 * 1809 * When the cmd is %DISABLE_KEY then it must succeed. 1810 * 1811 * Note that it is permissible to not decrypt a frame even if a key 1812 * for it has been uploaded to hardware, the stack will not make any 1813 * decision based on whether a key has been uploaded or not but rather 1814 * based on the receive flags. 1815 * 1816 * The &struct ieee80211_key_conf structure pointed to by the @key 1817 * parameter is guaranteed to be valid until another call to set_key() 1818 * removes it, but it can only be used as a cookie to differentiate 1819 * keys. 1820 * 1821 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1822 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1823 * handler. 1824 * The update_tkip_key() call updates the driver with the new phase 1 key. 1825 * This happens every time the iv16 wraps around (every 65536 packets). The 1826 * set_key() call will happen only once for each key (unless the AP did 1827 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1828 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1829 * handler is software decryption with wrap around of iv16. 1830 * 1831 * The set_default_unicast_key() call updates the default WEP key index 1832 * configured to the hardware for WEP encryption type. This is required 1833 * for devices that support offload of data packets (e.g. ARP responses). 1834 */ 1835 1836/** 1837 * DOC: Powersave support 1838 * 1839 * mac80211 has support for various powersave implementations. 1840 * 1841 * First, it can support hardware that handles all powersaving by itself, 1842 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1843 * flag. In that case, it will be told about the desired powersave mode 1844 * with the %IEEE80211_CONF_PS flag depending on the association status. 1845 * The hardware must take care of sending nullfunc frames when necessary, 1846 * i.e. when entering and leaving powersave mode. The hardware is required 1847 * to look at the AID in beacons and signal to the AP that it woke up when 1848 * it finds traffic directed to it. 1849 * 1850 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1851 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1852 * with hardware wakeup and sleep states. Driver is responsible for waking 1853 * up the hardware before issuing commands to the hardware and putting it 1854 * back to sleep at appropriate times. 1855 * 1856 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1857 * buffered multicast/broadcast frames after the beacon. Also it must be 1858 * possible to send frames and receive the acknowledment frame. 1859 * 1860 * Other hardware designs cannot send nullfunc frames by themselves and also 1861 * need software support for parsing the TIM bitmap. This is also supported 1862 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1863 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1864 * required to pass up beacons. The hardware is still required to handle 1865 * waking up for multicast traffic; if it cannot the driver must handle that 1866 * as best as it can, mac80211 is too slow to do that. 1867 * 1868 * Dynamic powersave is an extension to normal powersave in which the 1869 * hardware stays awake for a user-specified period of time after sending a 1870 * frame so that reply frames need not be buffered and therefore delayed to 1871 * the next wakeup. It's compromise of getting good enough latency when 1872 * there's data traffic and still saving significantly power in idle 1873 * periods. 1874 * 1875 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1876 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1877 * flag and mac80211 will handle everything automatically. Additionally, 1878 * hardware having support for the dynamic PS feature may set the 1879 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1880 * dynamic PS mode itself. The driver needs to look at the 1881 * @dynamic_ps_timeout hardware configuration value and use it that value 1882 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1883 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1884 * enabled whenever user has enabled powersave. 1885 * 1886 * Driver informs U-APSD client support by enabling 1887 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1888 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1889 * Nullfunc frames and stay awake until the service period has ended. To 1890 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1891 * from that AC are transmitted with powersave enabled. 1892 * 1893 * Note: U-APSD client mode is not yet supported with 1894 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1895 */ 1896 1897/** 1898 * DOC: Beacon filter support 1899 * 1900 * Some hardware have beacon filter support to reduce host cpu wakeups 1901 * which will reduce system power consumption. It usually works so that 1902 * the firmware creates a checksum of the beacon but omits all constantly 1903 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1904 * beacon is forwarded to the host, otherwise it will be just dropped. That 1905 * way the host will only receive beacons where some relevant information 1906 * (for example ERP protection or WMM settings) have changed. 1907 * 1908 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1909 * interface capability. The driver needs to enable beacon filter support 1910 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1911 * power save is enabled, the stack will not check for beacon loss and the 1912 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1913 * 1914 * The time (or number of beacons missed) until the firmware notifies the 1915 * driver of a beacon loss event (which in turn causes the driver to call 1916 * ieee80211_beacon_loss()) should be configurable and will be controlled 1917 * by mac80211 and the roaming algorithm in the future. 1918 * 1919 * Since there may be constantly changing information elements that nothing 1920 * in the software stack cares about, we will, in the future, have mac80211 1921 * tell the driver which information elements are interesting in the sense 1922 * that we want to see changes in them. This will include 1923 * - a list of information element IDs 1924 * - a list of OUIs for the vendor information element 1925 * 1926 * Ideally, the hardware would filter out any beacons without changes in the 1927 * requested elements, but if it cannot support that it may, at the expense 1928 * of some efficiency, filter out only a subset. For example, if the device 1929 * doesn't support checking for OUIs it should pass up all changes in all 1930 * vendor information elements. 1931 * 1932 * Note that change, for the sake of simplification, also includes information 1933 * elements appearing or disappearing from the beacon. 1934 * 1935 * Some hardware supports an "ignore list" instead, just make sure nothing 1936 * that was requested is on the ignore list, and include commonly changing 1937 * information element IDs in the ignore list, for example 11 (BSS load) and 1938 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1939 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1940 * it could also include some currently unused IDs. 1941 * 1942 * 1943 * In addition to these capabilities, hardware should support notifying the 1944 * host of changes in the beacon RSSI. This is relevant to implement roaming 1945 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1946 * the received data packets). This can consist in notifying the host when 1947 * the RSSI changes significantly or when it drops below or rises above 1948 * configurable thresholds. In the future these thresholds will also be 1949 * configured by mac80211 (which gets them from userspace) to implement 1950 * them as the roaming algorithm requires. 1951 * 1952 * If the hardware cannot implement this, the driver should ask it to 1953 * periodically pass beacon frames to the host so that software can do the 1954 * signal strength threshold checking. 1955 */ 1956 1957/** 1958 * DOC: Spatial multiplexing power save 1959 * 1960 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1961 * power in an 802.11n implementation. For details on the mechanism 1962 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1963 * "11.2.3 SM power save". 1964 * 1965 * The mac80211 implementation is capable of sending action frames 1966 * to update the AP about the station's SMPS mode, and will instruct 1967 * the driver to enter the specific mode. It will also announce the 1968 * requested SMPS mode during the association handshake. Hardware 1969 * support for this feature is required, and can be indicated by 1970 * hardware flags. 1971 * 1972 * The default mode will be "automatic", which nl80211/cfg80211 1973 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1974 * turned off otherwise. 1975 * 1976 * To support this feature, the driver must set the appropriate 1977 * hardware support flags, and handle the SMPS flag to the config() 1978 * operation. It will then with this mechanism be instructed to 1979 * enter the requested SMPS mode while associated to an HT AP. 1980 */ 1981 1982/** 1983 * DOC: Frame filtering 1984 * 1985 * mac80211 requires to see many management frames for proper 1986 * operation, and users may want to see many more frames when 1987 * in monitor mode. However, for best CPU usage and power consumption, 1988 * having as few frames as possible percolate through the stack is 1989 * desirable. Hence, the hardware should filter as much as possible. 1990 * 1991 * To achieve this, mac80211 uses filter flags (see below) to tell 1992 * the driver's configure_filter() function which frames should be 1993 * passed to mac80211 and which should be filtered out. 1994 * 1995 * Before configure_filter() is invoked, the prepare_multicast() 1996 * callback is invoked with the parameters @mc_count and @mc_list 1997 * for the combined multicast address list of all virtual interfaces. 1998 * It's use is optional, and it returns a u64 that is passed to 1999 * configure_filter(). Additionally, configure_filter() has the 2000 * arguments @changed_flags telling which flags were changed and 2001 * @total_flags with the new flag states. 2002 * 2003 * If your device has no multicast address filters your driver will 2004 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2005 * parameter to see whether multicast frames should be accepted 2006 * or dropped. 2007 * 2008 * All unsupported flags in @total_flags must be cleared. 2009 * Hardware does not support a flag if it is incapable of _passing_ 2010 * the frame to the stack. Otherwise the driver must ignore 2011 * the flag, but not clear it. 2012 * You must _only_ clear the flag (announce no support for the 2013 * flag to mac80211) if you are not able to pass the packet type 2014 * to the stack (so the hardware always filters it). 2015 * So for example, you should clear @FIF_CONTROL, if your hardware 2016 * always filters control frames. If your hardware always passes 2017 * control frames to the kernel and is incapable of filtering them, 2018 * you do _not_ clear the @FIF_CONTROL flag. 2019 * This rule applies to all other FIF flags as well. 2020 */ 2021 2022/** 2023 * DOC: AP support for powersaving clients 2024 * 2025 * In order to implement AP and P2P GO modes, mac80211 has support for 2026 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2027 * There currently is no support for sAPSD. 2028 * 2029 * There is one assumption that mac80211 makes, namely that a client 2030 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2031 * Both are supported, and both can be used by the same client, but 2032 * they can't be used concurrently by the same client. This simplifies 2033 * the driver code. 2034 * 2035 * The first thing to keep in mind is that there is a flag for complete 2036 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2037 * mac80211 expects the driver to handle most of the state machine for 2038 * powersaving clients and will ignore the PM bit in incoming frames. 2039 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2040 * stations' powersave transitions. In this mode, mac80211 also doesn't 2041 * handle PS-Poll/uAPSD. 2042 * 2043 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2044 * PM bit in incoming frames for client powersave transitions. When a 2045 * station goes to sleep, we will stop transmitting to it. There is, 2046 * however, a race condition: a station might go to sleep while there is 2047 * data buffered on hardware queues. If the device has support for this 2048 * it will reject frames, and the driver should give the frames back to 2049 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2050 * cause mac80211 to retry the frame when the station wakes up. The 2051 * driver is also notified of powersave transitions by calling its 2052 * @sta_notify callback. 2053 * 2054 * When the station is asleep, it has three choices: it can wake up, 2055 * it can PS-Poll, or it can possibly start a uAPSD service period. 2056 * Waking up is implemented by simply transmitting all buffered (and 2057 * filtered) frames to the station. This is the easiest case. When 2058 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2059 * will inform the driver of this with the @allow_buffered_frames 2060 * callback; this callback is optional. mac80211 will then transmit 2061 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2062 * on each frame. The last frame in the service period (or the only 2063 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2064 * indicate that it ends the service period; as this frame must have 2065 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2066 * When TX status is reported for this frame, the service period is 2067 * marked has having ended and a new one can be started by the peer. 2068 * 2069 * Additionally, non-bufferable MMPDUs can also be transmitted by 2070 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2071 * 2072 * Another race condition can happen on some devices like iwlwifi 2073 * when there are frames queued for the station and it wakes up 2074 * or polls; the frames that are already queued could end up being 2075 * transmitted first instead, causing reordering and/or wrong 2076 * processing of the EOSP. The cause is that allowing frames to be 2077 * transmitted to a certain station is out-of-band communication to 2078 * the device. To allow this problem to be solved, the driver can 2079 * call ieee80211_sta_block_awake() if frames are buffered when it 2080 * is notified that the station went to sleep. When all these frames 2081 * have been filtered (see above), it must call the function again 2082 * to indicate that the station is no longer blocked. 2083 * 2084 * If the driver buffers frames in the driver for aggregation in any 2085 * way, it must use the ieee80211_sta_set_buffered() call when it is 2086 * notified of the station going to sleep to inform mac80211 of any 2087 * TIDs that have frames buffered. Note that when a station wakes up 2088 * this information is reset (hence the requirement to call it when 2089 * informed of the station going to sleep). Then, when a service 2090 * period starts for any reason, @release_buffered_frames is called 2091 * with the number of frames to be released and which TIDs they are 2092 * to come from. In this case, the driver is responsible for setting 2093 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2094 * to help the @more_data paramter is passed to tell the driver if 2095 * there is more data on other TIDs -- the TIDs to release frames 2096 * from are ignored since mac80211 doesn't know how many frames the 2097 * buffers for those TIDs contain. 2098 * 2099 * If the driver also implement GO mode, where absence periods may 2100 * shorten service periods (or abort PS-Poll responses), it must 2101 * filter those response frames except in the case of frames that 2102 * are buffered in the driver -- those must remain buffered to avoid 2103 * reordering. Because it is possible that no frames are released 2104 * in this case, the driver must call ieee80211_sta_eosp() 2105 * to indicate to mac80211 that the service period ended anyway. 2106 * 2107 * Finally, if frames from multiple TIDs are released from mac80211 2108 * but the driver might reorder them, it must clear & set the flags 2109 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2110 * and also take care of the EOSP and MORE_DATA bits in the frame. 2111 * The driver may also use ieee80211_sta_eosp() in this case. 2112 * 2113 * Note that if the driver ever buffers frames other than QoS-data 2114 * frames, it must take care to never send a non-QoS-data frame as 2115 * the last frame in a service period, adding a QoS-nulldata frame 2116 * after a non-QoS-data frame if needed. 2117 */ 2118 2119/** 2120 * DOC: HW queue control 2121 * 2122 * Before HW queue control was introduced, mac80211 only had a single static 2123 * assignment of per-interface AC software queues to hardware queues. This 2124 * was problematic for a few reasons: 2125 * 1) off-channel transmissions might get stuck behind other frames 2126 * 2) multiple virtual interfaces couldn't be handled correctly 2127 * 3) after-DTIM frames could get stuck behind other frames 2128 * 2129 * To solve this, hardware typically uses multiple different queues for all 2130 * the different usages, and this needs to be propagated into mac80211 so it 2131 * won't have the same problem with the software queues. 2132 * 2133 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2134 * flag that tells it that the driver implements its own queue control. To do 2135 * so, the driver will set up the various queues in each &struct ieee80211_vif 2136 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2137 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2138 * if necessary will queue the frame on the right software queue that mirrors 2139 * the hardware queue. 2140 * Additionally, the driver has to then use these HW queue IDs for the queue 2141 * management functions (ieee80211_stop_queue() et al.) 2142 * 2143 * The driver is free to set up the queue mappings as needed, multiple virtual 2144 * interfaces may map to the same hardware queues if needed. The setup has to 2145 * happen during add_interface or change_interface callbacks. For example, a 2146 * driver supporting station+station and station+AP modes might decide to have 2147 * 10 hardware queues to handle different scenarios: 2148 * 2149 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2150 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2151 * after-DTIM queue for AP: 8 2152 * off-channel queue: 9 2153 * 2154 * It would then set up the hardware like this: 2155 * hw.offchannel_tx_hw_queue = 9 2156 * 2157 * and the first virtual interface that is added as follows: 2158 * vif.hw_queue[IEEE80211_AC_VO] = 0 2159 * vif.hw_queue[IEEE80211_AC_VI] = 1 2160 * vif.hw_queue[IEEE80211_AC_BE] = 2 2161 * vif.hw_queue[IEEE80211_AC_BK] = 3 2162 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2163 * and the second virtual interface with 4-7. 2164 * 2165 * If queue 6 gets full, for example, mac80211 would only stop the second 2166 * virtual interface's BE queue since virtual interface queues are per AC. 2167 * 2168 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2169 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2170 * queue could potentially be shared since mac80211 will look at cab_queue when 2171 * a queue is stopped/woken even if the interface is not in AP mode. 2172 */ 2173 2174/** 2175 * enum ieee80211_filter_flags - hardware filter flags 2176 * 2177 * These flags determine what the filter in hardware should be 2178 * programmed to let through and what should not be passed to the 2179 * stack. It is always safe to pass more frames than requested, 2180 * but this has negative impact on power consumption. 2181 * 2182 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 2183 * think of the BSS as your network segment and then this corresponds 2184 * to the regular ethernet device promiscuous mode. 2185 * 2186 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2187 * by the user or if the hardware is not capable of filtering by 2188 * multicast address. 2189 * 2190 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2191 * %RX_FLAG_FAILED_FCS_CRC for them) 2192 * 2193 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2194 * the %RX_FLAG_FAILED_PLCP_CRC for them 2195 * 2196 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2197 * to the hardware that it should not filter beacons or probe responses 2198 * by BSSID. Filtering them can greatly reduce the amount of processing 2199 * mac80211 needs to do and the amount of CPU wakeups, so you should 2200 * honour this flag if possible. 2201 * 2202 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2203 * is not set then only those addressed to this station. 2204 * 2205 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2206 * 2207 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2208 * those addressed to this station. 2209 * 2210 * @FIF_PROBE_REQ: pass probe request frames 2211 */ 2212enum ieee80211_filter_flags { 2213 FIF_PROMISC_IN_BSS = 1<<0, 2214 FIF_ALLMULTI = 1<<1, 2215 FIF_FCSFAIL = 1<<2, 2216 FIF_PLCPFAIL = 1<<3, 2217 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2218 FIF_CONTROL = 1<<5, 2219 FIF_OTHER_BSS = 1<<6, 2220 FIF_PSPOLL = 1<<7, 2221 FIF_PROBE_REQ = 1<<8, 2222}; 2223 2224/** 2225 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2226 * 2227 * These flags are used with the ampdu_action() callback in 2228 * &struct ieee80211_ops to indicate which action is needed. 2229 * 2230 * Note that drivers MUST be able to deal with a TX aggregation 2231 * session being stopped even before they OK'ed starting it by 2232 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2233 * might receive the addBA frame and send a delBA right away! 2234 * 2235 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2236 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2237 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2238 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2239 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2240 * queued packets, now unaggregated. After all packets are transmitted the 2241 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2242 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2243 * called when the station is removed. There's no need or reason to call 2244 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2245 * session is gone and removes the station. 2246 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2247 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2248 * now the connection is dropped and the station will be removed. Drivers 2249 * should clean up and drop remaining packets when this is called. 2250 */ 2251enum ieee80211_ampdu_mlme_action { 2252 IEEE80211_AMPDU_RX_START, 2253 IEEE80211_AMPDU_RX_STOP, 2254 IEEE80211_AMPDU_TX_START, 2255 IEEE80211_AMPDU_TX_STOP_CONT, 2256 IEEE80211_AMPDU_TX_STOP_FLUSH, 2257 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2258 IEEE80211_AMPDU_TX_OPERATIONAL, 2259}; 2260 2261/** 2262 * enum ieee80211_frame_release_type - frame release reason 2263 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2264 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2265 * frame received on trigger-enabled AC 2266 */ 2267enum ieee80211_frame_release_type { 2268 IEEE80211_FRAME_RELEASE_PSPOLL, 2269 IEEE80211_FRAME_RELEASE_UAPSD, 2270}; 2271 2272/** 2273 * enum ieee80211_rate_control_changed - flags to indicate what changed 2274 * 2275 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2276 * to this station changed. The actual bandwidth is in the station 2277 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2278 * flag changes, for HT and VHT the bandwidth field changes. 2279 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2280 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2281 * changed (in IBSS mode) due to discovering more information about 2282 * the peer. 2283 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2284 * by the peer 2285 */ 2286enum ieee80211_rate_control_changed { 2287 IEEE80211_RC_BW_CHANGED = BIT(0), 2288 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2289 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2290 IEEE80211_RC_NSS_CHANGED = BIT(3), 2291}; 2292 2293/** 2294 * enum ieee80211_roc_type - remain on channel type 2295 * 2296 * With the support for multi channel contexts and multi channel operations, 2297 * remain on channel operations might be limited/deferred/aborted by other 2298 * flows/operations which have higher priority (and vise versa). 2299 * Specifying the ROC type can be used by devices to prioritize the ROC 2300 * operations compared to other operations/flows. 2301 * 2302 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2303 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2304 * for sending managment frames offchannel. 2305 */ 2306enum ieee80211_roc_type { 2307 IEEE80211_ROC_TYPE_NORMAL = 0, 2308 IEEE80211_ROC_TYPE_MGMT_TX, 2309}; 2310 2311/** 2312 * struct ieee80211_ops - callbacks from mac80211 to the driver 2313 * 2314 * This structure contains various callbacks that the driver may 2315 * handle or, in some cases, must handle, for example to configure 2316 * the hardware to a new channel or to transmit a frame. 2317 * 2318 * @tx: Handler that 802.11 module calls for each transmitted frame. 2319 * skb contains the buffer starting from the IEEE 802.11 header. 2320 * The low-level driver should send the frame out based on 2321 * configuration in the TX control data. This handler should, 2322 * preferably, never fail and stop queues appropriately. 2323 * Must be atomic. 2324 * 2325 * @start: Called before the first netdevice attached to the hardware 2326 * is enabled. This should turn on the hardware and must turn on 2327 * frame reception (for possibly enabled monitor interfaces.) 2328 * Returns negative error codes, these may be seen in userspace, 2329 * or zero. 2330 * When the device is started it should not have a MAC address 2331 * to avoid acknowledging frames before a non-monitor device 2332 * is added. 2333 * Must be implemented and can sleep. 2334 * 2335 * @stop: Called after last netdevice attached to the hardware 2336 * is disabled. This should turn off the hardware (at least 2337 * it must turn off frame reception.) 2338 * May be called right after add_interface if that rejects 2339 * an interface. If you added any work onto the mac80211 workqueue 2340 * you should ensure to cancel it on this callback. 2341 * Must be implemented and can sleep. 2342 * 2343 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2344 * stop transmitting and doing any other configuration, and then 2345 * ask the device to suspend. This is only invoked when WoWLAN is 2346 * configured, otherwise the device is deconfigured completely and 2347 * reconfigured at resume time. 2348 * The driver may also impose special conditions under which it 2349 * wants to use the "normal" suspend (deconfigure), say if it only 2350 * supports WoWLAN when the device is associated. In this case, it 2351 * must return 1 from this function. 2352 * 2353 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2354 * now resuming its operation, after this the device must be fully 2355 * functional again. If this returns an error, the only way out is 2356 * to also unregister the device. If it returns 1, then mac80211 2357 * will also go through the regular complete restart on resume. 2358 * 2359 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2360 * modified. The reason is that device_set_wakeup_enable() is 2361 * supposed to be called when the configuration changes, not only 2362 * in suspend(). 2363 * 2364 * @add_interface: Called when a netdevice attached to the hardware is 2365 * enabled. Because it is not called for monitor mode devices, @start 2366 * and @stop must be implemented. 2367 * The driver should perform any initialization it needs before 2368 * the device can be enabled. The initial configuration for the 2369 * interface is given in the conf parameter. 2370 * The callback may refuse to add an interface by returning a 2371 * negative error code (which will be seen in userspace.) 2372 * Must be implemented and can sleep. 2373 * 2374 * @change_interface: Called when a netdevice changes type. This callback 2375 * is optional, but only if it is supported can interface types be 2376 * switched while the interface is UP. The callback may sleep. 2377 * Note that while an interface is being switched, it will not be 2378 * found by the interface iteration callbacks. 2379 * 2380 * @remove_interface: Notifies a driver that an interface is going down. 2381 * The @stop callback is called after this if it is the last interface 2382 * and no monitor interfaces are present. 2383 * When all interfaces are removed, the MAC address in the hardware 2384 * must be cleared so the device no longer acknowledges packets, 2385 * the mac_addr member of the conf structure is, however, set to the 2386 * MAC address of the device going away. 2387 * Hence, this callback must be implemented. It can sleep. 2388 * 2389 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2390 * function to change hardware configuration, e.g., channel. 2391 * This function should never fail but returns a negative error code 2392 * if it does. The callback can sleep. 2393 * 2394 * @bss_info_changed: Handler for configuration requests related to BSS 2395 * parameters that may vary during BSS's lifespan, and may affect low 2396 * level driver (e.g. assoc/disassoc status, erp parameters). 2397 * This function should not be used if no BSS has been set, unless 2398 * for association indication. The @changed parameter indicates which 2399 * of the bss parameters has changed when a call is made. The callback 2400 * can sleep. 2401 * 2402 * @prepare_multicast: Prepare for multicast filter configuration. 2403 * This callback is optional, and its return value is passed 2404 * to configure_filter(). This callback must be atomic. 2405 * 2406 * @configure_filter: Configure the device's RX filter. 2407 * See the section "Frame filtering" for more information. 2408 * This callback must be implemented and can sleep. 2409 * 2410 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2411 * must be set or cleared for a given STA. Must be atomic. 2412 * 2413 * @set_key: See the section "Hardware crypto acceleration" 2414 * This callback is only called between add_interface and 2415 * remove_interface calls, i.e. while the given virtual interface 2416 * is enabled. 2417 * Returns a negative error code if the key can't be added. 2418 * The callback can sleep. 2419 * 2420 * @update_tkip_key: See the section "Hardware crypto acceleration" 2421 * This callback will be called in the context of Rx. Called for drivers 2422 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2423 * The callback must be atomic. 2424 * 2425 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2426 * host is suspended, it can assign this callback to retrieve the data 2427 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2428 * After rekeying was done it should (for example during resume) notify 2429 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2430 * 2431 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2432 * WEP when the device sends data packets autonomously, e.g. for ARP 2433 * offloading. The index can be 0-3, or -1 for unsetting it. 2434 * 2435 * @hw_scan: Ask the hardware to service the scan request, no need to start 2436 * the scan state machine in stack. The scan must honour the channel 2437 * configuration done by the regulatory agent in the wiphy's 2438 * registered bands. The hardware (or the driver) needs to make sure 2439 * that power save is disabled. 2440 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2441 * entire IEs after the SSID, so that drivers need not look at these 2442 * at all but just send them after the SSID -- mac80211 includes the 2443 * (extended) supported rates and HT information (where applicable). 2444 * When the scan finishes, ieee80211_scan_completed() must be called; 2445 * note that it also must be called when the scan cannot finish due to 2446 * any error unless this callback returned a negative error code. 2447 * The callback can sleep. 2448 * 2449 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2450 * The driver should ask the hardware to cancel the scan (if possible), 2451 * but the scan will be completed only after the driver will call 2452 * ieee80211_scan_completed(). 2453 * This callback is needed for wowlan, to prevent enqueueing a new 2454 * scan_work after the low-level driver was already suspended. 2455 * The callback can sleep. 2456 * 2457 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2458 * specific intervals. The driver must call the 2459 * ieee80211_sched_scan_results() function whenever it finds results. 2460 * This process will continue until sched_scan_stop is called. 2461 * 2462 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2463 * 2464 * @sw_scan_start: Notifier function that is called just before a software scan 2465 * is started. Can be NULL, if the driver doesn't need this notification. 2466 * The callback can sleep. 2467 * 2468 * @sw_scan_complete: Notifier function that is called just after a 2469 * software scan finished. Can be NULL, if the driver doesn't need 2470 * this notification. 2471 * The callback can sleep. 2472 * 2473 * @get_stats: Return low-level statistics. 2474 * Returns zero if statistics are available. 2475 * The callback can sleep. 2476 * 2477 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2478 * callback should be provided to read the TKIP transmit IVs (both IV32 2479 * and IV16) for the given key from hardware. 2480 * The callback must be atomic. 2481 * 2482 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2483 * if the device does fragmentation by itself; if this callback is 2484 * implemented then the stack will not do fragmentation. 2485 * The callback can sleep. 2486 * 2487 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2488 * The callback can sleep. 2489 * 2490 * @sta_add: Notifies low level driver about addition of an associated station, 2491 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2492 * 2493 * @sta_remove: Notifies low level driver about removal of an associated 2494 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 2495 * returns it isn't safe to use the pointer, not even RCU protected; 2496 * no RCU grace period is guaranteed between returning here and freeing 2497 * the station. See @sta_pre_rcu_remove if needed. 2498 * This callback can sleep. 2499 * 2500 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2501 * when a station is added to mac80211's station list. This callback 2502 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2503 * conditional. This callback can sleep. 2504 * 2505 * @sta_remove_debugfs: Remove the debugfs files which were added using 2506 * @sta_add_debugfs. This callback can sleep. 2507 * 2508 * @sta_notify: Notifies low level driver about power state transition of an 2509 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2510 * in AP mode, this callback will not be called when the flag 2511 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2512 * 2513 * @sta_state: Notifies low level driver about state transition of a 2514 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2515 * This callback is mutually exclusive with @sta_add/@sta_remove. 2516 * It must not fail for down transitions but may fail for transitions 2517 * up the list of states. Also note that after the callback returns it 2518 * isn't safe to use the pointer, not even RCU protected - no RCU grace 2519 * period is guaranteed between returning here and freeing the station. 2520 * See @sta_pre_rcu_remove if needed. 2521 * The callback can sleep. 2522 * 2523 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 2524 * synchronisation. This is useful if a driver needs to have station 2525 * pointers protected using RCU, it can then use this call to clear 2526 * the pointers instead of waiting for an RCU grace period to elapse 2527 * in @sta_state. 2528 * The callback can sleep. 2529 * 2530 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2531 * used to transmit to the station. The changes are advertised with bits 2532 * from &enum ieee80211_rate_control_changed and the values are reflected 2533 * in the station data. This callback should only be used when the driver 2534 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2535 * otherwise the rate control algorithm is notified directly. 2536 * Must be atomic. 2537 * 2538 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2539 * bursting) for a hardware TX queue. 2540 * Returns a negative error code on failure. 2541 * The callback can sleep. 2542 * 2543 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2544 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2545 * required function. 2546 * The callback can sleep. 2547 * 2548 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2549 * Currently, this is only used for IBSS mode debugging. Is not a 2550 * required function. 2551 * The callback can sleep. 2552 * 2553 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2554 * with other STAs in the IBSS. This is only used in IBSS mode. This 2555 * function is optional if the firmware/hardware takes full care of 2556 * TSF synchronization. 2557 * The callback can sleep. 2558 * 2559 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2560 * This is needed only for IBSS mode and the result of this function is 2561 * used to determine whether to reply to Probe Requests. 2562 * Returns non-zero if this device sent the last beacon. 2563 * The callback can sleep. 2564 * 2565 * @ampdu_action: Perform a certain A-MPDU action 2566 * The RA/TID combination determines the destination and TID we want 2567 * the ampdu action to be performed for. The action is defined through 2568 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2569 * is the first frame we expect to perform the action on. Notice 2570 * that TX/RX_STOP can pass NULL for this parameter. 2571 * The @buf_size parameter is only valid when the action is set to 2572 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2573 * buffer size (number of subframes) for this session -- the driver 2574 * may neither send aggregates containing more subframes than this 2575 * nor send aggregates in a way that lost frames would exceed the 2576 * buffer size. If just limiting the aggregate size, this would be 2577 * possible with a buf_size of 8: 2578 * - TX: 1.....7 2579 * - RX: 2....7 (lost frame #1) 2580 * - TX: 8..1... 2581 * which is invalid since #1 was now re-transmitted well past the 2582 * buffer size of 8. Correct ways to retransmit #1 would be: 2583 * - TX: 1 or 18 or 81 2584 * Even "189" would be wrong since 1 could be lost again. 2585 * 2586 * Returns a negative error code on failure. 2587 * The callback can sleep. 2588 * 2589 * @get_survey: Return per-channel survey information 2590 * 2591 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2592 * need to set wiphy->rfkill_poll to %true before registration, 2593 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2594 * The callback can sleep. 2595 * 2596 * @set_coverage_class: Set slot time for given coverage class as specified 2597 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2598 * accordingly. This callback is not required and may sleep. 2599 * 2600 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 2601 * be %NULL. The callback can sleep. 2602 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2603 * 2604 * @flush: Flush all pending frames from the hardware queue, making sure 2605 * that the hardware queues are empty. The @queues parameter is a bitmap 2606 * of queues to flush, which is useful if different virtual interfaces 2607 * use different hardware queues; it may also indicate all queues. 2608 * If the parameter @drop is set to %true, pending frames may be dropped. 2609 * The callback can sleep. 2610 * 2611 * @channel_switch: Drivers that need (or want) to offload the channel 2612 * switch operation for CSAs received from the AP may implement this 2613 * callback. They must then call ieee80211_chswitch_done() to indicate 2614 * completion of the channel switch. 2615 * 2616 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2617 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2618 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2619 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2620 * 2621 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2622 * 2623 * @remain_on_channel: Starts an off-channel period on the given channel, must 2624 * call back to ieee80211_ready_on_channel() when on that channel. Note 2625 * that normal channel traffic is not stopped as this is intended for hw 2626 * offload. Frames to transmit on the off-channel channel are transmitted 2627 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2628 * duration (which will always be non-zero) expires, the driver must call 2629 * ieee80211_remain_on_channel_expired(). 2630 * Note that this callback may be called while the device is in IDLE and 2631 * must be accepted in this case. 2632 * This callback may sleep. 2633 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2634 * aborted before it expires. This callback may sleep. 2635 * 2636 * @set_ringparam: Set tx and rx ring sizes. 2637 * 2638 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2639 * 2640 * @tx_frames_pending: Check if there is any pending frame in the hardware 2641 * queues before entering power save. 2642 * 2643 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2644 * when transmitting a frame. Currently only legacy rates are handled. 2645 * The callback can sleep. 2646 * @rssi_callback: Notify driver when the average RSSI goes above/below 2647 * thresholds that were registered previously. The callback can sleep. 2648 * 2649 * @release_buffered_frames: Release buffered frames according to the given 2650 * parameters. In the case where the driver buffers some frames for 2651 * sleeping stations mac80211 will use this callback to tell the driver 2652 * to release some frames, either for PS-poll or uAPSD. 2653 * Note that if the @more_data paramter is %false the driver must check 2654 * if there are more frames on the given TIDs, and if there are more than 2655 * the frames being released then it must still set the more-data bit in 2656 * the frame. If the @more_data parameter is %true, then of course the 2657 * more-data bit must always be set. 2658 * The @tids parameter tells the driver which TIDs to release frames 2659 * from, for PS-poll it will always have only a single bit set. 2660 * In the case this is used for a PS-poll initiated release, the 2661 * @num_frames parameter will always be 1 so code can be shared. In 2662 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2663 * on the TX status (and must report TX status) so that the PS-poll 2664 * period is properly ended. This is used to avoid sending multiple 2665 * responses for a retried PS-poll frame. 2666 * In the case this is used for uAPSD, the @num_frames parameter may be 2667 * bigger than one, but the driver may send fewer frames (it must send 2668 * at least one, however). In this case it is also responsible for 2669 * setting the EOSP flag in the QoS header of the frames. Also, when the 2670 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2671 * on the last frame in the SP. Alternatively, it may call the function 2672 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 2673 * This callback must be atomic. 2674 * @allow_buffered_frames: Prepare device to allow the given number of frames 2675 * to go out to the given station. The frames will be sent by mac80211 2676 * via the usual TX path after this call. The TX information for frames 2677 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2678 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2679 * frames from multiple TIDs are released and the driver might reorder 2680 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2681 * on the last frame and clear it on all others and also handle the EOSP 2682 * bit in the QoS header correctly. Alternatively, it can also call the 2683 * ieee80211_sta_eosp() function. 2684 * The @tids parameter is a bitmap and tells the driver which TIDs the 2685 * frames will be on; it will at most have two bits set. 2686 * This callback must be atomic. 2687 * 2688 * @get_et_sset_count: Ethtool API to get string-set count. 2689 * 2690 * @get_et_stats: Ethtool API to get a set of u64 stats. 2691 * 2692 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2693 * and perhaps other supported types of ethtool data-sets. 2694 * 2695 * @get_rssi: Get current signal strength in dBm, the function is optional 2696 * and can sleep. 2697 * 2698 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2699 * before associated. In multi-channel scenarios, a virtual interface is 2700 * bound to a channel before it is associated, but as it isn't associated 2701 * yet it need not necessarily be given airtime, in particular since any 2702 * transmission to a P2P GO needs to be synchronized against the GO's 2703 * powersave state. mac80211 will call this function before transmitting a 2704 * management frame prior to having successfully associated to allow the 2705 * driver to give it channel time for the transmission, to get a response 2706 * and to be able to synchronize with the GO. 2707 * The callback will be called before each transmission and upon return 2708 * mac80211 will transmit the frame right away. 2709 * The callback is optional and can (should!) sleep. 2710 * 2711 * @add_chanctx: Notifies device driver about new channel context creation. 2712 * @remove_chanctx: Notifies device driver about channel context destruction. 2713 * @change_chanctx: Notifies device driver about channel context changes that 2714 * may happen when combining different virtual interfaces on the same 2715 * channel context with different settings 2716 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2717 * to vif. Possible use is for hw queue remapping. 2718 * @unassign_vif_chanctx: Notifies device driver about channel context being 2719 * unbound from vif. 2720 * @start_ap: Start operation on the AP interface, this is called after all the 2721 * information in bss_conf is set and beacon can be retrieved. A channel 2722 * context is bound before this is called. Note that if the driver uses 2723 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2724 * just "paused" for scanning/ROC, which is indicated by the beacon being 2725 * disabled/enabled via @bss_info_changed. 2726 * @stop_ap: Stop operation on the AP interface. 2727 * 2728 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2729 * reconfiguration has completed. This can help the driver implement the 2730 * reconfiguration step. Also called when reconfiguring because the 2731 * driver's resume function returned 1, as this is just like an "inline" 2732 * hardware restart. This callback may sleep. 2733 * 2734 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2735 * Currently, this is only called for managed or P2P client interfaces. 2736 * This callback is optional; it must not sleep. 2737 * 2738 * @channel_switch_beacon: Starts a channel switch to a new channel. 2739 * Beacons are modified to include CSA or ECSA IEs before calling this 2740 * function. The corresponding count fields in these IEs must be 2741 * decremented, and when they reach 1 the driver must call 2742 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 2743 * get the csa counter decremented by mac80211, but must check if it is 2744 * 1 using ieee80211_csa_is_complete() after the beacon has been 2745 * transmitted and then call ieee80211_csa_finish(). 2746 * If the CSA count starts as zero or 1, this function will not be called, 2747 * since there won't be any time to beacon before the switch anyway. 2748 * 2749 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 2750 * information in bss_conf is set up and the beacon can be retrieved. A 2751 * channel context is bound before this is called. 2752 * @leave_ibss: Leave the IBSS again. 2753 */ 2754struct ieee80211_ops { 2755 void (*tx)(struct ieee80211_hw *hw, 2756 struct ieee80211_tx_control *control, 2757 struct sk_buff *skb); 2758 int (*start)(struct ieee80211_hw *hw); 2759 void (*stop)(struct ieee80211_hw *hw); 2760#ifdef CONFIG_PM 2761 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2762 int (*resume)(struct ieee80211_hw *hw); 2763 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2764#endif 2765 int (*add_interface)(struct ieee80211_hw *hw, 2766 struct ieee80211_vif *vif); 2767 int (*change_interface)(struct ieee80211_hw *hw, 2768 struct ieee80211_vif *vif, 2769 enum nl80211_iftype new_type, bool p2p); 2770 void (*remove_interface)(struct ieee80211_hw *hw, 2771 struct ieee80211_vif *vif); 2772 int (*config)(struct ieee80211_hw *hw, u32 changed); 2773 void (*bss_info_changed)(struct ieee80211_hw *hw, 2774 struct ieee80211_vif *vif, 2775 struct ieee80211_bss_conf *info, 2776 u32 changed); 2777 2778 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2779 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2780 2781 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2782 struct netdev_hw_addr_list *mc_list); 2783 void (*configure_filter)(struct ieee80211_hw *hw, 2784 unsigned int changed_flags, 2785 unsigned int *total_flags, 2786 u64 multicast); 2787 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2788 bool set); 2789 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2790 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2791 struct ieee80211_key_conf *key); 2792 void (*update_tkip_key)(struct ieee80211_hw *hw, 2793 struct ieee80211_vif *vif, 2794 struct ieee80211_key_conf *conf, 2795 struct ieee80211_sta *sta, 2796 u32 iv32, u16 *phase1key); 2797 void (*set_rekey_data)(struct ieee80211_hw *hw, 2798 struct ieee80211_vif *vif, 2799 struct cfg80211_gtk_rekey_data *data); 2800 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2801 struct ieee80211_vif *vif, int idx); 2802 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2803 struct cfg80211_scan_request *req); 2804 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2805 struct ieee80211_vif *vif); 2806 int (*sched_scan_start)(struct ieee80211_hw *hw, 2807 struct ieee80211_vif *vif, 2808 struct cfg80211_sched_scan_request *req, 2809 struct ieee80211_sched_scan_ies *ies); 2810 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2811 struct ieee80211_vif *vif); 2812 void (*sw_scan_start)(struct ieee80211_hw *hw); 2813 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2814 int (*get_stats)(struct ieee80211_hw *hw, 2815 struct ieee80211_low_level_stats *stats); 2816 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2817 u32 *iv32, u16 *iv16); 2818 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2819 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2820 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2821 struct ieee80211_sta *sta); 2822 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2823 struct ieee80211_sta *sta); 2824#ifdef CONFIG_MAC80211_DEBUGFS 2825 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2826 struct ieee80211_vif *vif, 2827 struct ieee80211_sta *sta, 2828 struct dentry *dir); 2829 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2830 struct ieee80211_vif *vif, 2831 struct ieee80211_sta *sta, 2832 struct dentry *dir); 2833#endif 2834 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2835 enum sta_notify_cmd, struct ieee80211_sta *sta); 2836 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2837 struct ieee80211_sta *sta, 2838 enum ieee80211_sta_state old_state, 2839 enum ieee80211_sta_state new_state); 2840 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 2841 struct ieee80211_vif *vif, 2842 struct ieee80211_sta *sta); 2843 void (*sta_rc_update)(struct ieee80211_hw *hw, 2844 struct ieee80211_vif *vif, 2845 struct ieee80211_sta *sta, 2846 u32 changed); 2847 int (*conf_tx)(struct ieee80211_hw *hw, 2848 struct ieee80211_vif *vif, u16 ac, 2849 const struct ieee80211_tx_queue_params *params); 2850 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2851 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2852 u64 tsf); 2853 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2854 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2855 int (*ampdu_action)(struct ieee80211_hw *hw, 2856 struct ieee80211_vif *vif, 2857 enum ieee80211_ampdu_mlme_action action, 2858 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2859 u8 buf_size); 2860 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2861 struct survey_info *survey); 2862 void (*rfkill_poll)(struct ieee80211_hw *hw); 2863 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2864#ifdef CONFIG_NL80211_TESTMODE 2865 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2866 void *data, int len); 2867 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2868 struct netlink_callback *cb, 2869 void *data, int len); 2870#endif 2871 void (*flush)(struct ieee80211_hw *hw, u32 queues, bool drop); 2872 void (*channel_switch)(struct ieee80211_hw *hw, 2873 struct ieee80211_channel_switch *ch_switch); 2874 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2875 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2876 2877 int (*remain_on_channel)(struct ieee80211_hw *hw, 2878 struct ieee80211_vif *vif, 2879 struct ieee80211_channel *chan, 2880 int duration, 2881 enum ieee80211_roc_type type); 2882 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2883 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2884 void (*get_ringparam)(struct ieee80211_hw *hw, 2885 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2886 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2887 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2888 const struct cfg80211_bitrate_mask *mask); 2889 void (*rssi_callback)(struct ieee80211_hw *hw, 2890 struct ieee80211_vif *vif, 2891 enum ieee80211_rssi_event rssi_event); 2892 2893 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2894 struct ieee80211_sta *sta, 2895 u16 tids, int num_frames, 2896 enum ieee80211_frame_release_type reason, 2897 bool more_data); 2898 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2899 struct ieee80211_sta *sta, 2900 u16 tids, int num_frames, 2901 enum ieee80211_frame_release_type reason, 2902 bool more_data); 2903 2904 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2905 struct ieee80211_vif *vif, int sset); 2906 void (*get_et_stats)(struct ieee80211_hw *hw, 2907 struct ieee80211_vif *vif, 2908 struct ethtool_stats *stats, u64 *data); 2909 void (*get_et_strings)(struct ieee80211_hw *hw, 2910 struct ieee80211_vif *vif, 2911 u32 sset, u8 *data); 2912 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2913 struct ieee80211_sta *sta, s8 *rssi_dbm); 2914 2915 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2916 struct ieee80211_vif *vif); 2917 2918 int (*add_chanctx)(struct ieee80211_hw *hw, 2919 struct ieee80211_chanctx_conf *ctx); 2920 void (*remove_chanctx)(struct ieee80211_hw *hw, 2921 struct ieee80211_chanctx_conf *ctx); 2922 void (*change_chanctx)(struct ieee80211_hw *hw, 2923 struct ieee80211_chanctx_conf *ctx, 2924 u32 changed); 2925 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2926 struct ieee80211_vif *vif, 2927 struct ieee80211_chanctx_conf *ctx); 2928 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2929 struct ieee80211_vif *vif, 2930 struct ieee80211_chanctx_conf *ctx); 2931 2932 void (*restart_complete)(struct ieee80211_hw *hw); 2933 2934#if IS_ENABLED(CONFIG_IPV6) 2935 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2936 struct ieee80211_vif *vif, 2937 struct inet6_dev *idev); 2938#endif 2939 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 2940 struct ieee80211_vif *vif, 2941 struct cfg80211_chan_def *chandef); 2942 2943 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2944 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2945}; 2946 2947/** 2948 * ieee80211_alloc_hw - Allocate a new hardware device 2949 * 2950 * This must be called once for each hardware device. The returned pointer 2951 * must be used to refer to this device when calling other functions. 2952 * mac80211 allocates a private data area for the driver pointed to by 2953 * @priv in &struct ieee80211_hw, the size of this area is given as 2954 * @priv_data_len. 2955 * 2956 * @priv_data_len: length of private data 2957 * @ops: callbacks for this device 2958 * 2959 * Return: A pointer to the new hardware device, or %NULL on error. 2960 */ 2961struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2962 const struct ieee80211_ops *ops); 2963 2964/** 2965 * ieee80211_register_hw - Register hardware device 2966 * 2967 * You must call this function before any other functions in 2968 * mac80211. Note that before a hardware can be registered, you 2969 * need to fill the contained wiphy's information. 2970 * 2971 * @hw: the device to register as returned by ieee80211_alloc_hw() 2972 * 2973 * Return: 0 on success. An error code otherwise. 2974 */ 2975int ieee80211_register_hw(struct ieee80211_hw *hw); 2976 2977/** 2978 * struct ieee80211_tpt_blink - throughput blink description 2979 * @throughput: throughput in Kbit/sec 2980 * @blink_time: blink time in milliseconds 2981 * (full cycle, ie. one off + one on period) 2982 */ 2983struct ieee80211_tpt_blink { 2984 int throughput; 2985 int blink_time; 2986}; 2987 2988/** 2989 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2990 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2991 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2992 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2993 * interface is connected in some way, including being an AP 2994 */ 2995enum ieee80211_tpt_led_trigger_flags { 2996 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2997 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2998 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2999}; 3000 3001#ifdef CONFIG_MAC80211_LEDS 3002char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3003char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3004char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3005char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3006char *__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3007 unsigned int flags, 3008 const struct ieee80211_tpt_blink *blink_table, 3009 unsigned int blink_table_len); 3010#endif 3011/** 3012 * ieee80211_get_tx_led_name - get name of TX LED 3013 * 3014 * mac80211 creates a transmit LED trigger for each wireless hardware 3015 * that can be used to drive LEDs if your driver registers a LED device. 3016 * This function returns the name (or %NULL if not configured for LEDs) 3017 * of the trigger so you can automatically link the LED device. 3018 * 3019 * @hw: the hardware to get the LED trigger name for 3020 * 3021 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3022 */ 3023static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3024{ 3025#ifdef CONFIG_MAC80211_LEDS 3026 return __ieee80211_get_tx_led_name(hw); 3027#else 3028 return NULL; 3029#endif 3030} 3031 3032/** 3033 * ieee80211_get_rx_led_name - get name of RX LED 3034 * 3035 * mac80211 creates a receive LED trigger for each wireless hardware 3036 * that can be used to drive LEDs if your driver registers a LED device. 3037 * This function returns the name (or %NULL if not configured for LEDs) 3038 * of the trigger so you can automatically link the LED device. 3039 * 3040 * @hw: the hardware to get the LED trigger name for 3041 * 3042 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3043 */ 3044static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3045{ 3046#ifdef CONFIG_MAC80211_LEDS 3047 return __ieee80211_get_rx_led_name(hw); 3048#else 3049 return NULL; 3050#endif 3051} 3052 3053/** 3054 * ieee80211_get_assoc_led_name - get name of association LED 3055 * 3056 * mac80211 creates a association LED trigger for each wireless hardware 3057 * that can be used to drive LEDs if your driver registers a LED device. 3058 * This function returns the name (or %NULL if not configured for LEDs) 3059 * of the trigger so you can automatically link the LED device. 3060 * 3061 * @hw: the hardware to get the LED trigger name for 3062 * 3063 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3064 */ 3065static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3066{ 3067#ifdef CONFIG_MAC80211_LEDS 3068 return __ieee80211_get_assoc_led_name(hw); 3069#else 3070 return NULL; 3071#endif 3072} 3073 3074/** 3075 * ieee80211_get_radio_led_name - get name of radio LED 3076 * 3077 * mac80211 creates a radio change LED trigger for each wireless hardware 3078 * that can be used to drive LEDs if your driver registers a LED device. 3079 * This function returns the name (or %NULL if not configured for LEDs) 3080 * of the trigger so you can automatically link the LED device. 3081 * 3082 * @hw: the hardware to get the LED trigger name for 3083 * 3084 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3085 */ 3086static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3087{ 3088#ifdef CONFIG_MAC80211_LEDS 3089 return __ieee80211_get_radio_led_name(hw); 3090#else 3091 return NULL; 3092#endif 3093} 3094 3095/** 3096 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3097 * @hw: the hardware to create the trigger for 3098 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3099 * @blink_table: the blink table -- needs to be ordered by throughput 3100 * @blink_table_len: size of the blink table 3101 * 3102 * Return: %NULL (in case of error, or if no LED triggers are 3103 * configured) or the name of the new trigger. 3104 * 3105 * Note: This function must be called before ieee80211_register_hw(). 3106 */ 3107static inline char * 3108ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3109 const struct ieee80211_tpt_blink *blink_table, 3110 unsigned int blink_table_len) 3111{ 3112#ifdef CONFIG_MAC80211_LEDS 3113 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3114 blink_table_len); 3115#else 3116 return NULL; 3117#endif 3118} 3119 3120/** 3121 * ieee80211_unregister_hw - Unregister a hardware device 3122 * 3123 * This function instructs mac80211 to free allocated resources 3124 * and unregister netdevices from the networking subsystem. 3125 * 3126 * @hw: the hardware to unregister 3127 */ 3128void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3129 3130/** 3131 * ieee80211_free_hw - free hardware descriptor 3132 * 3133 * This function frees everything that was allocated, including the 3134 * private data for the driver. You must call ieee80211_unregister_hw() 3135 * before calling this function. 3136 * 3137 * @hw: the hardware to free 3138 */ 3139void ieee80211_free_hw(struct ieee80211_hw *hw); 3140 3141/** 3142 * ieee80211_restart_hw - restart hardware completely 3143 * 3144 * Call this function when the hardware was restarted for some reason 3145 * (hardware error, ...) and the driver is unable to restore its state 3146 * by itself. mac80211 assumes that at this point the driver/hardware 3147 * is completely uninitialised and stopped, it starts the process by 3148 * calling the ->start() operation. The driver will need to reset all 3149 * internal state that it has prior to calling this function. 3150 * 3151 * @hw: the hardware to restart 3152 */ 3153void ieee80211_restart_hw(struct ieee80211_hw *hw); 3154 3155/** 3156 * ieee80211_napi_add - initialize mac80211 NAPI context 3157 * @hw: the hardware to initialize the NAPI context on 3158 * @napi: the NAPI context to initialize 3159 * @napi_dev: dummy NAPI netdevice, here to not waste the space if the 3160 * driver doesn't use NAPI 3161 * @poll: poll function 3162 * @weight: default weight 3163 * 3164 * See also netif_napi_add(). 3165 */ 3166void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, 3167 struct net_device *napi_dev, 3168 int (*poll)(struct napi_struct *, int), 3169 int weight); 3170 3171/** 3172 * ieee80211_rx - receive frame 3173 * 3174 * Use this function to hand received frames to mac80211. The receive 3175 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3176 * paged @skb is used, the driver is recommended to put the ieee80211 3177 * header of the frame on the linear part of the @skb to avoid memory 3178 * allocation and/or memcpy by the stack. 3179 * 3180 * This function may not be called in IRQ context. Calls to this function 3181 * for a single hardware must be synchronized against each other. Calls to 3182 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3183 * mixed for a single hardware. Must not run concurrently with 3184 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3185 * 3186 * In process context use instead ieee80211_rx_ni(). 3187 * 3188 * @hw: the hardware this frame came in on 3189 * @skb: the buffer to receive, owned by mac80211 after this call 3190 */ 3191void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 3192 3193/** 3194 * ieee80211_rx_irqsafe - receive frame 3195 * 3196 * Like ieee80211_rx() but can be called in IRQ context 3197 * (internally defers to a tasklet.) 3198 * 3199 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3200 * be mixed for a single hardware.Must not run concurrently with 3201 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3202 * 3203 * @hw: the hardware this frame came in on 3204 * @skb: the buffer to receive, owned by mac80211 after this call 3205 */ 3206void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3207 3208/** 3209 * ieee80211_rx_ni - receive frame (in process context) 3210 * 3211 * Like ieee80211_rx() but can be called in process context 3212 * (internally disables bottom halves). 3213 * 3214 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3215 * not be mixed for a single hardware. Must not run concurrently with 3216 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3217 * 3218 * @hw: the hardware this frame came in on 3219 * @skb: the buffer to receive, owned by mac80211 after this call 3220 */ 3221static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3222 struct sk_buff *skb) 3223{ 3224 local_bh_disable(); 3225 ieee80211_rx(hw, skb); 3226 local_bh_enable(); 3227} 3228 3229/** 3230 * ieee80211_sta_ps_transition - PS transition for connected sta 3231 * 3232 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3233 * flag set, use this function to inform mac80211 about a connected station 3234 * entering/leaving PS mode. 3235 * 3236 * This function may not be called in IRQ context or with softirqs enabled. 3237 * 3238 * Calls to this function for a single hardware must be synchronized against 3239 * each other. 3240 * 3241 * @sta: currently connected sta 3242 * @start: start or stop PS 3243 * 3244 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3245 */ 3246int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3247 3248/** 3249 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3250 * (in process context) 3251 * 3252 * Like ieee80211_sta_ps_transition() but can be called in process context 3253 * (internally disables bottom halves). Concurrent call restriction still 3254 * applies. 3255 * 3256 * @sta: currently connected sta 3257 * @start: start or stop PS 3258 * 3259 * Return: Like ieee80211_sta_ps_transition(). 3260 */ 3261static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3262 bool start) 3263{ 3264 int ret; 3265 3266 local_bh_disable(); 3267 ret = ieee80211_sta_ps_transition(sta, start); 3268 local_bh_enable(); 3269 3270 return ret; 3271} 3272 3273/* 3274 * The TX headroom reserved by mac80211 for its own tx_status functions. 3275 * This is enough for the radiotap header. 3276 */ 3277#define IEEE80211_TX_STATUS_HEADROOM 14 3278 3279/** 3280 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3281 * @sta: &struct ieee80211_sta pointer for the sleeping station 3282 * @tid: the TID that has buffered frames 3283 * @buffered: indicates whether or not frames are buffered for this TID 3284 * 3285 * If a driver buffers frames for a powersave station instead of passing 3286 * them back to mac80211 for retransmission, the station may still need 3287 * to be told that there are buffered frames via the TIM bit. 3288 * 3289 * This function informs mac80211 whether or not there are frames that are 3290 * buffered in the driver for a given TID; mac80211 can then use this data 3291 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3292 * call! Beware of the locking!) 3293 * 3294 * If all frames are released to the station (due to PS-poll or uAPSD) 3295 * then the driver needs to inform mac80211 that there no longer are 3296 * frames buffered. However, when the station wakes up mac80211 assumes 3297 * that all buffered frames will be transmitted and clears this data, 3298 * drivers need to make sure they inform mac80211 about all buffered 3299 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3300 * 3301 * Note that technically mac80211 only needs to know this per AC, not per 3302 * TID, but since driver buffering will inevitably happen per TID (since 3303 * it is related to aggregation) it is easier to make mac80211 map the 3304 * TID to the AC as required instead of keeping track in all drivers that 3305 * use this API. 3306 */ 3307void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3308 u8 tid, bool buffered); 3309 3310/** 3311 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 3312 * 3313 * Call this function in a driver with per-packet rate selection support 3314 * to combine the rate info in the packet tx info with the most recent 3315 * rate selection table for the station entry. 3316 * 3317 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3318 * @sta: the receiver station to which this packet is sent. 3319 * @skb: the frame to be transmitted. 3320 * @dest: buffer for extracted rate/retry information 3321 * @max_rates: maximum number of rates to fetch 3322 */ 3323void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 3324 struct ieee80211_sta *sta, 3325 struct sk_buff *skb, 3326 struct ieee80211_tx_rate *dest, 3327 int max_rates); 3328 3329/** 3330 * ieee80211_tx_status - transmit status callback 3331 * 3332 * Call this function for all transmitted frames after they have been 3333 * transmitted. It is permissible to not call this function for 3334 * multicast frames but this can affect statistics. 3335 * 3336 * This function may not be called in IRQ context. Calls to this function 3337 * for a single hardware must be synchronized against each other. Calls 3338 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3339 * may not be mixed for a single hardware. Must not run concurrently with 3340 * ieee80211_rx() or ieee80211_rx_ni(). 3341 * 3342 * @hw: the hardware the frame was transmitted by 3343 * @skb: the frame that was transmitted, owned by mac80211 after this call 3344 */ 3345void ieee80211_tx_status(struct ieee80211_hw *hw, 3346 struct sk_buff *skb); 3347 3348/** 3349 * ieee80211_tx_status_ni - transmit status callback (in process context) 3350 * 3351 * Like ieee80211_tx_status() but can be called in process context. 3352 * 3353 * Calls to this function, ieee80211_tx_status() and 3354 * ieee80211_tx_status_irqsafe() may not be mixed 3355 * for a single hardware. 3356 * 3357 * @hw: the hardware the frame was transmitted by 3358 * @skb: the frame that was transmitted, owned by mac80211 after this call 3359 */ 3360static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3361 struct sk_buff *skb) 3362{ 3363 local_bh_disable(); 3364 ieee80211_tx_status(hw, skb); 3365 local_bh_enable(); 3366} 3367 3368/** 3369 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3370 * 3371 * Like ieee80211_tx_status() but can be called in IRQ context 3372 * (internally defers to a tasklet.) 3373 * 3374 * Calls to this function, ieee80211_tx_status() and 3375 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3376 * 3377 * @hw: the hardware the frame was transmitted by 3378 * @skb: the frame that was transmitted, owned by mac80211 after this call 3379 */ 3380void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3381 struct sk_buff *skb); 3382 3383/** 3384 * ieee80211_report_low_ack - report non-responding station 3385 * 3386 * When operating in AP-mode, call this function to report a non-responding 3387 * connected STA. 3388 * 3389 * @sta: the non-responding connected sta 3390 * @num_packets: number of packets sent to @sta without a response 3391 */ 3392void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3393 3394/** 3395 * ieee80211_beacon_get_tim - beacon generation function 3396 * @hw: pointer obtained from ieee80211_alloc_hw(). 3397 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3398 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3399 * Set to 0 if invalid (in non-AP modes). 3400 * @tim_length: pointer to variable that will receive the TIM IE length, 3401 * (including the ID and length bytes!). 3402 * Set to 0 if invalid (in non-AP modes). 3403 * 3404 * If the driver implements beaconing modes, it must use this function to 3405 * obtain the beacon frame/template. 3406 * 3407 * If the beacon frames are generated by the host system (i.e., not in 3408 * hardware/firmware), the driver uses this function to get each beacon 3409 * frame from mac80211 -- it is responsible for calling this function 3410 * before the beacon is needed (e.g. based on hardware interrupt). 3411 * 3412 * If the beacon frames are generated by the device, then the driver 3413 * must use the returned beacon as the template and change the TIM IE 3414 * according to the current DTIM parameters/TIM bitmap. 3415 * 3416 * The driver is responsible for freeing the returned skb. 3417 * 3418 * Return: The beacon template. %NULL on error. 3419 */ 3420struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3421 struct ieee80211_vif *vif, 3422 u16 *tim_offset, u16 *tim_length); 3423 3424/** 3425 * ieee80211_beacon_get - beacon generation function 3426 * @hw: pointer obtained from ieee80211_alloc_hw(). 3427 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3428 * 3429 * See ieee80211_beacon_get_tim(). 3430 * 3431 * Return: See ieee80211_beacon_get_tim(). 3432 */ 3433static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3434 struct ieee80211_vif *vif) 3435{ 3436 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3437} 3438 3439/** 3440 * ieee80211_csa_finish - notify mac80211 about channel switch 3441 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3442 * 3443 * After a channel switch announcement was scheduled and the counter in this 3444 * announcement hits 1, this function must be called by the driver to 3445 * notify mac80211 that the channel can be changed. 3446 */ 3447void ieee80211_csa_finish(struct ieee80211_vif *vif); 3448 3449/** 3450 * ieee80211_csa_is_complete - find out if counters reached 1 3451 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3452 * 3453 * This function returns whether the channel switch counters reached zero. 3454 */ 3455bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 3456 3457 3458/** 3459 * ieee80211_proberesp_get - retrieve a Probe Response template 3460 * @hw: pointer obtained from ieee80211_alloc_hw(). 3461 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3462 * 3463 * Creates a Probe Response template which can, for example, be uploaded to 3464 * hardware. The destination address should be set by the caller. 3465 * 3466 * Can only be called in AP mode. 3467 * 3468 * Return: The Probe Response template. %NULL on error. 3469 */ 3470struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3471 struct ieee80211_vif *vif); 3472 3473/** 3474 * ieee80211_pspoll_get - retrieve a PS Poll template 3475 * @hw: pointer obtained from ieee80211_alloc_hw(). 3476 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3477 * 3478 * Creates a PS Poll a template which can, for example, uploaded to 3479 * hardware. The template must be updated after association so that correct 3480 * AID, BSSID and MAC address is used. 3481 * 3482 * Note: Caller (or hardware) is responsible for setting the 3483 * &IEEE80211_FCTL_PM bit. 3484 * 3485 * Return: The PS Poll template. %NULL on error. 3486 */ 3487struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3488 struct ieee80211_vif *vif); 3489 3490/** 3491 * ieee80211_nullfunc_get - retrieve a nullfunc template 3492 * @hw: pointer obtained from ieee80211_alloc_hw(). 3493 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3494 * 3495 * Creates a Nullfunc template which can, for example, uploaded to 3496 * hardware. The template must be updated after association so that correct 3497 * BSSID and address is used. 3498 * 3499 * Note: Caller (or hardware) is responsible for setting the 3500 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3501 * 3502 * Return: The nullfunc template. %NULL on error. 3503 */ 3504struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3505 struct ieee80211_vif *vif); 3506 3507/** 3508 * ieee80211_probereq_get - retrieve a Probe Request template 3509 * @hw: pointer obtained from ieee80211_alloc_hw(). 3510 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3511 * @ssid: SSID buffer 3512 * @ssid_len: length of SSID 3513 * @tailroom: tailroom to reserve at end of SKB for IEs 3514 * 3515 * Creates a Probe Request template which can, for example, be uploaded to 3516 * hardware. 3517 * 3518 * Return: The Probe Request template. %NULL on error. 3519 */ 3520struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3521 struct ieee80211_vif *vif, 3522 const u8 *ssid, size_t ssid_len, 3523 size_t tailroom); 3524 3525/** 3526 * ieee80211_rts_get - RTS frame generation function 3527 * @hw: pointer obtained from ieee80211_alloc_hw(). 3528 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3529 * @frame: pointer to the frame that is going to be protected by the RTS. 3530 * @frame_len: the frame length (in octets). 3531 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3532 * @rts: The buffer where to store the RTS frame. 3533 * 3534 * If the RTS frames are generated by the host system (i.e., not in 3535 * hardware/firmware), the low-level driver uses this function to receive 3536 * the next RTS frame from the 802.11 code. The low-level is responsible 3537 * for calling this function before and RTS frame is needed. 3538 */ 3539void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3540 const void *frame, size_t frame_len, 3541 const struct ieee80211_tx_info *frame_txctl, 3542 struct ieee80211_rts *rts); 3543 3544/** 3545 * ieee80211_rts_duration - Get the duration field for an RTS frame 3546 * @hw: pointer obtained from ieee80211_alloc_hw(). 3547 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3548 * @frame_len: the length of the frame that is going to be protected by the RTS. 3549 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3550 * 3551 * If the RTS is generated in firmware, but the host system must provide 3552 * the duration field, the low-level driver uses this function to receive 3553 * the duration field value in little-endian byteorder. 3554 * 3555 * Return: The duration. 3556 */ 3557__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3558 struct ieee80211_vif *vif, size_t frame_len, 3559 const struct ieee80211_tx_info *frame_txctl); 3560 3561/** 3562 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3563 * @hw: pointer obtained from ieee80211_alloc_hw(). 3564 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3565 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3566 * @frame_len: the frame length (in octets). 3567 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3568 * @cts: The buffer where to store the CTS-to-self frame. 3569 * 3570 * If the CTS-to-self frames are generated by the host system (i.e., not in 3571 * hardware/firmware), the low-level driver uses this function to receive 3572 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3573 * for calling this function before and CTS-to-self frame is needed. 3574 */ 3575void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3576 struct ieee80211_vif *vif, 3577 const void *frame, size_t frame_len, 3578 const struct ieee80211_tx_info *frame_txctl, 3579 struct ieee80211_cts *cts); 3580 3581/** 3582 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3583 * @hw: pointer obtained from ieee80211_alloc_hw(). 3584 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3585 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3586 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3587 * 3588 * If the CTS-to-self is generated in firmware, but the host system must provide 3589 * the duration field, the low-level driver uses this function to receive 3590 * the duration field value in little-endian byteorder. 3591 * 3592 * Return: The duration. 3593 */ 3594__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3595 struct ieee80211_vif *vif, 3596 size_t frame_len, 3597 const struct ieee80211_tx_info *frame_txctl); 3598 3599/** 3600 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3601 * @hw: pointer obtained from ieee80211_alloc_hw(). 3602 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3603 * @band: the band to calculate the frame duration on 3604 * @frame_len: the length of the frame. 3605 * @rate: the rate at which the frame is going to be transmitted. 3606 * 3607 * Calculate the duration field of some generic frame, given its 3608 * length and transmission rate (in 100kbps). 3609 * 3610 * Return: The duration. 3611 */ 3612__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3613 struct ieee80211_vif *vif, 3614 enum ieee80211_band band, 3615 size_t frame_len, 3616 struct ieee80211_rate *rate); 3617 3618/** 3619 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3620 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3621 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3622 * 3623 * Function for accessing buffered broadcast and multicast frames. If 3624 * hardware/firmware does not implement buffering of broadcast/multicast 3625 * frames when power saving is used, 802.11 code buffers them in the host 3626 * memory. The low-level driver uses this function to fetch next buffered 3627 * frame. In most cases, this is used when generating beacon frame. 3628 * 3629 * Return: A pointer to the next buffered skb or NULL if no more buffered 3630 * frames are available. 3631 * 3632 * Note: buffered frames are returned only after DTIM beacon frame was 3633 * generated with ieee80211_beacon_get() and the low-level driver must thus 3634 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3635 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3636 * does not need to check for DTIM beacons separately and should be able to 3637 * use common code for all beacons. 3638 */ 3639struct sk_buff * 3640ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3641 3642/** 3643 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3644 * 3645 * This function returns the TKIP phase 1 key for the given IV32. 3646 * 3647 * @keyconf: the parameter passed with the set key 3648 * @iv32: IV32 to get the P1K for 3649 * @p1k: a buffer to which the key will be written, as 5 u16 values 3650 */ 3651void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3652 u32 iv32, u16 *p1k); 3653 3654/** 3655 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3656 * 3657 * This function returns the TKIP phase 1 key for the IV32 taken 3658 * from the given packet. 3659 * 3660 * @keyconf: the parameter passed with the set key 3661 * @skb: the packet to take the IV32 value from that will be encrypted 3662 * with this P1K 3663 * @p1k: a buffer to which the key will be written, as 5 u16 values 3664 */ 3665static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3666 struct sk_buff *skb, u16 *p1k) 3667{ 3668 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3669 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3670 u32 iv32 = get_unaligned_le32(&data[4]); 3671 3672 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3673} 3674 3675/** 3676 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3677 * 3678 * This function returns the TKIP phase 1 key for the given IV32 3679 * and transmitter address. 3680 * 3681 * @keyconf: the parameter passed with the set key 3682 * @ta: TA that will be used with the key 3683 * @iv32: IV32 to get the P1K for 3684 * @p1k: a buffer to which the key will be written, as 5 u16 values 3685 */ 3686void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3687 const u8 *ta, u32 iv32, u16 *p1k); 3688 3689/** 3690 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3691 * 3692 * This function computes the TKIP RC4 key for the IV values 3693 * in the packet. 3694 * 3695 * @keyconf: the parameter passed with the set key 3696 * @skb: the packet to take the IV32/IV16 values from that will be 3697 * encrypted with this key 3698 * @p2k: a buffer to which the key will be written, 16 bytes 3699 */ 3700void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3701 struct sk_buff *skb, u8 *p2k); 3702 3703/** 3704 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3705 * 3706 * This function computes the two AES-CMAC sub-keys, based on the 3707 * previously installed master key. 3708 * 3709 * @keyconf: the parameter passed with the set key 3710 * @k1: a buffer to be filled with the 1st sub-key 3711 * @k2: a buffer to be filled with the 2nd sub-key 3712 */ 3713void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3714 u8 *k1, u8 *k2); 3715 3716/** 3717 * struct ieee80211_key_seq - key sequence counter 3718 * 3719 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3720 * @ccmp: PN data, most significant byte first (big endian, 3721 * reverse order than in packet) 3722 * @aes_cmac: PN data, most significant byte first (big endian, 3723 * reverse order than in packet) 3724 */ 3725struct ieee80211_key_seq { 3726 union { 3727 struct { 3728 u32 iv32; 3729 u16 iv16; 3730 } tkip; 3731 struct { 3732 u8 pn[6]; 3733 } ccmp; 3734 struct { 3735 u8 pn[6]; 3736 } aes_cmac; 3737 }; 3738}; 3739 3740/** 3741 * ieee80211_get_key_tx_seq - get key TX sequence counter 3742 * 3743 * @keyconf: the parameter passed with the set key 3744 * @seq: buffer to receive the sequence data 3745 * 3746 * This function allows a driver to retrieve the current TX IV/PN 3747 * for the given key. It must not be called if IV generation is 3748 * offloaded to the device. 3749 * 3750 * Note that this function may only be called when no TX processing 3751 * can be done concurrently, for example when queues are stopped 3752 * and the stop has been synchronized. 3753 */ 3754void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3755 struct ieee80211_key_seq *seq); 3756 3757/** 3758 * ieee80211_get_key_rx_seq - get key RX sequence counter 3759 * 3760 * @keyconf: the parameter passed with the set key 3761 * @tid: The TID, or -1 for the management frame value (CCMP only); 3762 * the value on TID 0 is also used for non-QoS frames. For 3763 * CMAC, only TID 0 is valid. 3764 * @seq: buffer to receive the sequence data 3765 * 3766 * This function allows a driver to retrieve the current RX IV/PNs 3767 * for the given key. It must not be called if IV checking is done 3768 * by the device and not by mac80211. 3769 * 3770 * Note that this function may only be called when no RX processing 3771 * can be done concurrently. 3772 */ 3773void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3774 int tid, struct ieee80211_key_seq *seq); 3775 3776/** 3777 * ieee80211_set_key_tx_seq - set key TX sequence counter 3778 * 3779 * @keyconf: the parameter passed with the set key 3780 * @seq: new sequence data 3781 * 3782 * This function allows a driver to set the current TX IV/PNs for the 3783 * given key. This is useful when resuming from WoWLAN sleep and the 3784 * device may have transmitted frames using the PTK, e.g. replies to 3785 * ARP requests. 3786 * 3787 * Note that this function may only be called when no TX processing 3788 * can be done concurrently. 3789 */ 3790void ieee80211_set_key_tx_seq(struct ieee80211_key_conf *keyconf, 3791 struct ieee80211_key_seq *seq); 3792 3793/** 3794 * ieee80211_set_key_rx_seq - set key RX sequence counter 3795 * 3796 * @keyconf: the parameter passed with the set key 3797 * @tid: The TID, or -1 for the management frame value (CCMP only); 3798 * the value on TID 0 is also used for non-QoS frames. For 3799 * CMAC, only TID 0 is valid. 3800 * @seq: new sequence data 3801 * 3802 * This function allows a driver to set the current RX IV/PNs for the 3803 * given key. This is useful when resuming from WoWLAN sleep and GTK 3804 * rekey may have been done while suspended. It should not be called 3805 * if IV checking is done by the device and not by mac80211. 3806 * 3807 * Note that this function may only be called when no RX processing 3808 * can be done concurrently. 3809 */ 3810void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 3811 int tid, struct ieee80211_key_seq *seq); 3812 3813/** 3814 * ieee80211_remove_key - remove the given key 3815 * @keyconf: the parameter passed with the set key 3816 * 3817 * Remove the given key. If the key was uploaded to the hardware at the 3818 * time this function is called, it is not deleted in the hardware but 3819 * instead assumed to have been removed already. 3820 * 3821 * Note that due to locking considerations this function can (currently) 3822 * only be called during key iteration (ieee80211_iter_keys().) 3823 */ 3824void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 3825 3826/** 3827 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 3828 * @vif: the virtual interface to add the key on 3829 * @keyconf: new key data 3830 * 3831 * When GTK rekeying was done while the system was suspended, (a) new 3832 * key(s) will be available. These will be needed by mac80211 for proper 3833 * RX processing, so this function allows setting them. 3834 * 3835 * The function returns the newly allocated key structure, which will 3836 * have similar contents to the passed key configuration but point to 3837 * mac80211-owned memory. In case of errors, the function returns an 3838 * ERR_PTR(), use IS_ERR() etc. 3839 * 3840 * Note that this function assumes the key isn't added to hardware 3841 * acceleration, so no TX will be done with the key. Since it's a GTK 3842 * on managed (station) networks, this is true anyway. If the driver 3843 * calls this function from the resume callback and subsequently uses 3844 * the return code 1 to reconfigure the device, this key will be part 3845 * of the reconfiguration. 3846 * 3847 * Note that the driver should also call ieee80211_set_key_rx_seq() 3848 * for the new key for each TID to set up sequence counters properly. 3849 * 3850 * IMPORTANT: If this replaces a key that is present in the hardware, 3851 * then it will attempt to remove it during this call. In many cases 3852 * this isn't what you want, so call ieee80211_remove_key() first for 3853 * the key that's being replaced. 3854 */ 3855struct ieee80211_key_conf * 3856ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 3857 struct ieee80211_key_conf *keyconf); 3858 3859/** 3860 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3861 * @vif: virtual interface the rekeying was done on 3862 * @bssid: The BSSID of the AP, for checking association 3863 * @replay_ctr: the new replay counter after GTK rekeying 3864 * @gfp: allocation flags 3865 */ 3866void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3867 const u8 *replay_ctr, gfp_t gfp); 3868 3869/** 3870 * ieee80211_wake_queue - wake specific queue 3871 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3872 * @queue: queue number (counted from zero). 3873 * 3874 * Drivers should use this function instead of netif_wake_queue. 3875 */ 3876void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3877 3878/** 3879 * ieee80211_stop_queue - stop specific queue 3880 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3881 * @queue: queue number (counted from zero). 3882 * 3883 * Drivers should use this function instead of netif_stop_queue. 3884 */ 3885void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3886 3887/** 3888 * ieee80211_queue_stopped - test status of the queue 3889 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3890 * @queue: queue number (counted from zero). 3891 * 3892 * Drivers should use this function instead of netif_stop_queue. 3893 * 3894 * Return: %true if the queue is stopped. %false otherwise. 3895 */ 3896 3897int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3898 3899/** 3900 * ieee80211_stop_queues - stop all queues 3901 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3902 * 3903 * Drivers should use this function instead of netif_stop_queue. 3904 */ 3905void ieee80211_stop_queues(struct ieee80211_hw *hw); 3906 3907/** 3908 * ieee80211_wake_queues - wake all queues 3909 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3910 * 3911 * Drivers should use this function instead of netif_wake_queue. 3912 */ 3913void ieee80211_wake_queues(struct ieee80211_hw *hw); 3914 3915/** 3916 * ieee80211_scan_completed - completed hardware scan 3917 * 3918 * When hardware scan offload is used (i.e. the hw_scan() callback is 3919 * assigned) this function needs to be called by the driver to notify 3920 * mac80211 that the scan finished. This function can be called from 3921 * any context, including hardirq context. 3922 * 3923 * @hw: the hardware that finished the scan 3924 * @aborted: set to true if scan was aborted 3925 */ 3926void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3927 3928/** 3929 * ieee80211_sched_scan_results - got results from scheduled scan 3930 * 3931 * When a scheduled scan is running, this function needs to be called by the 3932 * driver whenever there are new scan results available. 3933 * 3934 * @hw: the hardware that is performing scheduled scans 3935 */ 3936void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3937 3938/** 3939 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3940 * 3941 * When a scheduled scan is running, this function can be called by 3942 * the driver if it needs to stop the scan to perform another task. 3943 * Usual scenarios are drivers that cannot continue the scheduled scan 3944 * while associating, for instance. 3945 * 3946 * @hw: the hardware that is performing scheduled scans 3947 */ 3948void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3949 3950/** 3951 * enum ieee80211_interface_iteration_flags - interface iteration flags 3952 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3953 * been added to the driver; However, note that during hardware 3954 * reconfiguration (after restart_hw) it will iterate over a new 3955 * interface and over all the existing interfaces even if they 3956 * haven't been re-added to the driver yet. 3957 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3958 * interfaces, even if they haven't been re-added to the driver yet. 3959 */ 3960enum ieee80211_interface_iteration_flags { 3961 IEEE80211_IFACE_ITER_NORMAL = 0, 3962 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3963}; 3964 3965/** 3966 * ieee80211_iterate_active_interfaces - iterate active interfaces 3967 * 3968 * This function iterates over the interfaces associated with a given 3969 * hardware that are currently active and calls the callback for them. 3970 * This function allows the iterator function to sleep, when the iterator 3971 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3972 * be used. 3973 * Does not iterate over a new interface during add_interface(). 3974 * 3975 * @hw: the hardware struct of which the interfaces should be iterated over 3976 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3977 * @iterator: the iterator function to call 3978 * @data: first argument of the iterator function 3979 */ 3980void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3981 u32 iter_flags, 3982 void (*iterator)(void *data, u8 *mac, 3983 struct ieee80211_vif *vif), 3984 void *data); 3985 3986/** 3987 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3988 * 3989 * This function iterates over the interfaces associated with a given 3990 * hardware that are currently active and calls the callback for them. 3991 * This function requires the iterator callback function to be atomic, 3992 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3993 * Does not iterate over a new interface during add_interface(). 3994 * 3995 * @hw: the hardware struct of which the interfaces should be iterated over 3996 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3997 * @iterator: the iterator function to call, cannot sleep 3998 * @data: first argument of the iterator function 3999 */ 4000void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4001 u32 iter_flags, 4002 void (*iterator)(void *data, 4003 u8 *mac, 4004 struct ieee80211_vif *vif), 4005 void *data); 4006 4007/** 4008 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4009 * 4010 * This function iterates over the interfaces associated with a given 4011 * hardware that are currently active and calls the callback for them. 4012 * This version can only be used while holding the RTNL. 4013 * 4014 * @hw: the hardware struct of which the interfaces should be iterated over 4015 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4016 * @iterator: the iterator function to call, cannot sleep 4017 * @data: first argument of the iterator function 4018 */ 4019void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4020 u32 iter_flags, 4021 void (*iterator)(void *data, 4022 u8 *mac, 4023 struct ieee80211_vif *vif), 4024 void *data); 4025 4026/** 4027 * ieee80211_queue_work - add work onto the mac80211 workqueue 4028 * 4029 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4030 * This helper ensures drivers are not queueing work when they should not be. 4031 * 4032 * @hw: the hardware struct for the interface we are adding work for 4033 * @work: the work we want to add onto the mac80211 workqueue 4034 */ 4035void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4036 4037/** 4038 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4039 * 4040 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4041 * workqueue. 4042 * 4043 * @hw: the hardware struct for the interface we are adding work for 4044 * @dwork: delayable work to queue onto the mac80211 workqueue 4045 * @delay: number of jiffies to wait before queueing 4046 */ 4047void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4048 struct delayed_work *dwork, 4049 unsigned long delay); 4050 4051/** 4052 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4053 * @sta: the station for which to start a BA session 4054 * @tid: the TID to BA on. 4055 * @timeout: session timeout value (in TUs) 4056 * 4057 * Return: success if addBA request was sent, failure otherwise 4058 * 4059 * Although mac80211/low level driver/user space application can estimate 4060 * the need to start aggregation on a certain RA/TID, the session level 4061 * will be managed by the mac80211. 4062 */ 4063int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4064 u16 timeout); 4065 4066/** 4067 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4068 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4069 * @ra: receiver address of the BA session recipient. 4070 * @tid: the TID to BA on. 4071 * 4072 * This function must be called by low level driver once it has 4073 * finished with preparations for the BA session. It can be called 4074 * from any context. 4075 */ 4076void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4077 u16 tid); 4078 4079/** 4080 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4081 * @sta: the station whose BA session to stop 4082 * @tid: the TID to stop BA. 4083 * 4084 * Return: negative error if the TID is invalid, or no aggregation active 4085 * 4086 * Although mac80211/low level driver/user space application can estimate 4087 * the need to stop aggregation on a certain RA/TID, the session level 4088 * will be managed by the mac80211. 4089 */ 4090int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4091 4092/** 4093 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4094 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4095 * @ra: receiver address of the BA session recipient. 4096 * @tid: the desired TID to BA on. 4097 * 4098 * This function must be called by low level driver once it has 4099 * finished with preparations for the BA session tear down. It 4100 * can be called from any context. 4101 */ 4102void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4103 u16 tid); 4104 4105/** 4106 * ieee80211_find_sta - find a station 4107 * 4108 * @vif: virtual interface to look for station on 4109 * @addr: station's address 4110 * 4111 * Return: The station, if found. %NULL otherwise. 4112 * 4113 * Note: This function must be called under RCU lock and the 4114 * resulting pointer is only valid under RCU lock as well. 4115 */ 4116struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4117 const u8 *addr); 4118 4119/** 4120 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4121 * 4122 * @hw: pointer as obtained from ieee80211_alloc_hw() 4123 * @addr: remote station's address 4124 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 4125 * 4126 * Return: The station, if found. %NULL otherwise. 4127 * 4128 * Note: This function must be called under RCU lock and the 4129 * resulting pointer is only valid under RCU lock as well. 4130 * 4131 * NOTE: You may pass NULL for localaddr, but then you will just get 4132 * the first STA that matches the remote address 'addr'. 4133 * We can have multiple STA associated with multiple 4134 * logical stations (e.g. consider a station connecting to another 4135 * BSSID on the same AP hardware without disconnecting first). 4136 * In this case, the result of this method with localaddr NULL 4137 * is not reliable. 4138 * 4139 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 4140 */ 4141struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 4142 const u8 *addr, 4143 const u8 *localaddr); 4144 4145/** 4146 * ieee80211_sta_block_awake - block station from waking up 4147 * @hw: the hardware 4148 * @pubsta: the station 4149 * @block: whether to block or unblock 4150 * 4151 * Some devices require that all frames that are on the queues 4152 * for a specific station that went to sleep are flushed before 4153 * a poll response or frames after the station woke up can be 4154 * delivered to that it. Note that such frames must be rejected 4155 * by the driver as filtered, with the appropriate status flag. 4156 * 4157 * This function allows implementing this mode in a race-free 4158 * manner. 4159 * 4160 * To do this, a driver must keep track of the number of frames 4161 * still enqueued for a specific station. If this number is not 4162 * zero when the station goes to sleep, the driver must call 4163 * this function to force mac80211 to consider the station to 4164 * be asleep regardless of the station's actual state. Once the 4165 * number of outstanding frames reaches zero, the driver must 4166 * call this function again to unblock the station. That will 4167 * cause mac80211 to be able to send ps-poll responses, and if 4168 * the station queried in the meantime then frames will also 4169 * be sent out as a result of this. Additionally, the driver 4170 * will be notified that the station woke up some time after 4171 * it is unblocked, regardless of whether the station actually 4172 * woke up while blocked or not. 4173 */ 4174void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 4175 struct ieee80211_sta *pubsta, bool block); 4176 4177/** 4178 * ieee80211_sta_eosp - notify mac80211 about end of SP 4179 * @pubsta: the station 4180 * 4181 * When a device transmits frames in a way that it can't tell 4182 * mac80211 in the TX status about the EOSP, it must clear the 4183 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 4184 * This applies for PS-Poll as well as uAPSD. 4185 * 4186 * Note that just like with _tx_status() and _rx() drivers must 4187 * not mix calls to irqsafe/non-irqsafe versions, this function 4188 * must not be mixed with those either. Use the all irqsafe, or 4189 * all non-irqsafe, don't mix! 4190 * 4191 * NB: the _irqsafe version of this function doesn't exist, no 4192 * driver needs it right now. Don't call this function if 4193 * you'd need the _irqsafe version, look at the git history 4194 * and restore the _irqsafe version! 4195 */ 4196void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 4197 4198/** 4199 * ieee80211_iter_keys - iterate keys programmed into the device 4200 * @hw: pointer obtained from ieee80211_alloc_hw() 4201 * @vif: virtual interface to iterate, may be %NULL for all 4202 * @iter: iterator function that will be called for each key 4203 * @iter_data: custom data to pass to the iterator function 4204 * 4205 * This function can be used to iterate all the keys known to 4206 * mac80211, even those that weren't previously programmed into 4207 * the device. This is intended for use in WoWLAN if the device 4208 * needs reprogramming of the keys during suspend. Note that due 4209 * to locking reasons, it is also only safe to call this at few 4210 * spots since it must hold the RTNL and be able to sleep. 4211 * 4212 * The order in which the keys are iterated matches the order 4213 * in which they were originally installed and handed to the 4214 * set_key callback. 4215 */ 4216void ieee80211_iter_keys(struct ieee80211_hw *hw, 4217 struct ieee80211_vif *vif, 4218 void (*iter)(struct ieee80211_hw *hw, 4219 struct ieee80211_vif *vif, 4220 struct ieee80211_sta *sta, 4221 struct ieee80211_key_conf *key, 4222 void *data), 4223 void *iter_data); 4224 4225/** 4226 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 4227 * @hw: pointre obtained from ieee80211_alloc_hw(). 4228 * @iter: iterator function 4229 * @iter_data: data passed to iterator function 4230 * 4231 * Iterate all active channel contexts. This function is atomic and 4232 * doesn't acquire any locks internally that might be held in other 4233 * places while calling into the driver. 4234 * 4235 * The iterator will not find a context that's being added (during 4236 * the driver callback to add it) but will find it while it's being 4237 * removed. 4238 * 4239 * Note that during hardware restart, all contexts that existed 4240 * before the restart are considered already present so will be 4241 * found while iterating, whether they've been re-added already 4242 * or not. 4243 */ 4244void ieee80211_iter_chan_contexts_atomic( 4245 struct ieee80211_hw *hw, 4246 void (*iter)(struct ieee80211_hw *hw, 4247 struct ieee80211_chanctx_conf *chanctx_conf, 4248 void *data), 4249 void *iter_data); 4250 4251/** 4252 * ieee80211_ap_probereq_get - retrieve a Probe Request template 4253 * @hw: pointer obtained from ieee80211_alloc_hw(). 4254 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4255 * 4256 * Creates a Probe Request template which can, for example, be uploaded to 4257 * hardware. The template is filled with bssid, ssid and supported rate 4258 * information. This function must only be called from within the 4259 * .bss_info_changed callback function and only in managed mode. The function 4260 * is only useful when the interface is associated, otherwise it will return 4261 * %NULL. 4262 * 4263 * Return: The Probe Request template. %NULL on error. 4264 */ 4265struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4266 struct ieee80211_vif *vif); 4267 4268/** 4269 * ieee80211_beacon_loss - inform hardware does not receive beacons 4270 * 4271 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4272 * 4273 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 4274 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 4275 * hardware is not receiving beacons with this function. 4276 */ 4277void ieee80211_beacon_loss(struct ieee80211_vif *vif); 4278 4279/** 4280 * ieee80211_connection_loss - inform hardware has lost connection to the AP 4281 * 4282 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4283 * 4284 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 4285 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 4286 * needs to inform if the connection to the AP has been lost. 4287 * The function may also be called if the connection needs to be terminated 4288 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 4289 * 4290 * This function will cause immediate change to disassociated state, 4291 * without connection recovery attempts. 4292 */ 4293void ieee80211_connection_loss(struct ieee80211_vif *vif); 4294 4295/** 4296 * ieee80211_resume_disconnect - disconnect from AP after resume 4297 * 4298 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4299 * 4300 * Instructs mac80211 to disconnect from the AP after resume. 4301 * Drivers can use this after WoWLAN if they know that the 4302 * connection cannot be kept up, for example because keys were 4303 * used while the device was asleep but the replay counters or 4304 * similar cannot be retrieved from the device during resume. 4305 * 4306 * Note that due to implementation issues, if the driver uses 4307 * the reconfiguration functionality during resume the interface 4308 * will still be added as associated first during resume and then 4309 * disconnect normally later. 4310 * 4311 * This function can only be called from the resume callback and 4312 * the driver must not be holding any of its own locks while it 4313 * calls this function, or at least not any locks it needs in the 4314 * key configuration paths (if it supports HW crypto). 4315 */ 4316void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 4317 4318/** 4319 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 4320 * rssi threshold triggered 4321 * 4322 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4323 * @rssi_event: the RSSI trigger event type 4324 * @gfp: context flags 4325 * 4326 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 4327 * monitoring is configured with an rssi threshold, the driver will inform 4328 * whenever the rssi level reaches the threshold. 4329 */ 4330void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4331 enum nl80211_cqm_rssi_threshold_event rssi_event, 4332 gfp_t gfp); 4333 4334/** 4335 * ieee80211_radar_detected - inform that a radar was detected 4336 * 4337 * @hw: pointer as obtained from ieee80211_alloc_hw() 4338 */ 4339void ieee80211_radar_detected(struct ieee80211_hw *hw); 4340 4341/** 4342 * ieee80211_chswitch_done - Complete channel switch process 4343 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4344 * @success: make the channel switch successful or not 4345 * 4346 * Complete the channel switch post-process: set the new operational channel 4347 * and wake up the suspended queues. 4348 */ 4349void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 4350 4351/** 4352 * ieee80211_request_smps - request SM PS transition 4353 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4354 * @smps_mode: new SM PS mode 4355 * 4356 * This allows the driver to request an SM PS transition in managed 4357 * mode. This is useful when the driver has more information than 4358 * the stack about possible interference, for example by bluetooth. 4359 */ 4360void ieee80211_request_smps(struct ieee80211_vif *vif, 4361 enum ieee80211_smps_mode smps_mode); 4362 4363/** 4364 * ieee80211_ready_on_channel - notification of remain-on-channel start 4365 * @hw: pointer as obtained from ieee80211_alloc_hw() 4366 */ 4367void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 4368 4369/** 4370 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 4371 * @hw: pointer as obtained from ieee80211_alloc_hw() 4372 */ 4373void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 4374 4375/** 4376 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 4377 * 4378 * in order not to harm the system performance and user experience, the device 4379 * may request not to allow any rx ba session and tear down existing rx ba 4380 * sessions based on system constraints such as periodic BT activity that needs 4381 * to limit wlan activity (eg.sco or a2dp)." 4382 * in such cases, the intention is to limit the duration of the rx ppdu and 4383 * therefore prevent the peer device to use a-mpdu aggregation. 4384 * 4385 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4386 * @ba_rx_bitmap: Bit map of open rx ba per tid 4387 * @addr: & to bssid mac address 4388 */ 4389void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4390 const u8 *addr); 4391 4392/** 4393 * ieee80211_send_bar - send a BlockAckReq frame 4394 * 4395 * can be used to flush pending frames from the peer's aggregation reorder 4396 * buffer. 4397 * 4398 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4399 * @ra: the peer's destination address 4400 * @tid: the TID of the aggregation session 4401 * @ssn: the new starting sequence number for the receiver 4402 */ 4403void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4404 4405/* Rate control API */ 4406 4407/** 4408 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4409 * 4410 * @hw: The hardware the algorithm is invoked for. 4411 * @sband: The band this frame is being transmitted on. 4412 * @bss_conf: the current BSS configuration 4413 * @skb: the skb that will be transmitted, the control information in it needs 4414 * to be filled in 4415 * @reported_rate: The rate control algorithm can fill this in to indicate 4416 * which rate should be reported to userspace as the current rate and 4417 * used for rate calculations in the mesh network. 4418 * @rts: whether RTS will be used for this frame because it is longer than the 4419 * RTS threshold 4420 * @short_preamble: whether mac80211 will request short-preamble transmission 4421 * if the selected rate supports it 4422 * @max_rate_idx: user-requested maximum (legacy) rate 4423 * (deprecated; this will be removed once drivers get updated to use 4424 * rate_idx_mask) 4425 * @rate_idx_mask: user-requested (legacy) rate mask 4426 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 4427 * @bss: whether this frame is sent out in AP or IBSS mode 4428 */ 4429struct ieee80211_tx_rate_control { 4430 struct ieee80211_hw *hw; 4431 struct ieee80211_supported_band *sband; 4432 struct ieee80211_bss_conf *bss_conf; 4433 struct sk_buff *skb; 4434 struct ieee80211_tx_rate reported_rate; 4435 bool rts, short_preamble; 4436 u8 max_rate_idx; 4437 u32 rate_idx_mask; 4438 u8 *rate_idx_mcs_mask; 4439 bool bss; 4440}; 4441 4442struct rate_control_ops { 4443 const char *name; 4444 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4445 void (*free)(void *priv); 4446 4447 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4448 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4449 struct cfg80211_chan_def *chandef, 4450 struct ieee80211_sta *sta, void *priv_sta); 4451 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4452 struct cfg80211_chan_def *chandef, 4453 struct ieee80211_sta *sta, void *priv_sta, 4454 u32 changed); 4455 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4456 void *priv_sta); 4457 4458 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4459 struct ieee80211_sta *sta, void *priv_sta, 4460 struct sk_buff *skb); 4461 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4462 struct ieee80211_tx_rate_control *txrc); 4463 4464 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4465 struct dentry *dir); 4466 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4467}; 4468 4469static inline int rate_supported(struct ieee80211_sta *sta, 4470 enum ieee80211_band band, 4471 int index) 4472{ 4473 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4474} 4475 4476/** 4477 * rate_control_send_low - helper for drivers for management/no-ack frames 4478 * 4479 * Rate control algorithms that agree to use the lowest rate to 4480 * send management frames and NO_ACK data with the respective hw 4481 * retries should use this in the beginning of their mac80211 get_rate 4482 * callback. If true is returned the rate control can simply return. 4483 * If false is returned we guarantee that sta and sta and priv_sta is 4484 * not null. 4485 * 4486 * Rate control algorithms wishing to do more intelligent selection of 4487 * rate for multicast/broadcast frames may choose to not use this. 4488 * 4489 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4490 * that this may be null. 4491 * @priv_sta: private rate control structure. This may be null. 4492 * @txrc: rate control information we sholud populate for mac80211. 4493 */ 4494bool rate_control_send_low(struct ieee80211_sta *sta, 4495 void *priv_sta, 4496 struct ieee80211_tx_rate_control *txrc); 4497 4498 4499static inline s8 4500rate_lowest_index(struct ieee80211_supported_band *sband, 4501 struct ieee80211_sta *sta) 4502{ 4503 int i; 4504 4505 for (i = 0; i < sband->n_bitrates; i++) 4506 if (rate_supported(sta, sband->band, i)) 4507 return i; 4508 4509 /* warn when we cannot find a rate. */ 4510 WARN_ON_ONCE(1); 4511 4512 /* and return 0 (the lowest index) */ 4513 return 0; 4514} 4515 4516static inline 4517bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4518 struct ieee80211_sta *sta) 4519{ 4520 unsigned int i; 4521 4522 for (i = 0; i < sband->n_bitrates; i++) 4523 if (rate_supported(sta, sband->band, i)) 4524 return true; 4525 return false; 4526} 4527 4528/** 4529 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 4530 * 4531 * When not doing a rate control probe to test rates, rate control should pass 4532 * its rate selection to mac80211. If the driver supports receiving a station 4533 * rate table, it will use it to ensure that frames are always sent based on 4534 * the most recent rate control module decision. 4535 * 4536 * @hw: pointer as obtained from ieee80211_alloc_hw() 4537 * @pubsta: &struct ieee80211_sta pointer to the target destination. 4538 * @rates: new tx rate set to be used for this station. 4539 */ 4540int rate_control_set_rates(struct ieee80211_hw *hw, 4541 struct ieee80211_sta *pubsta, 4542 struct ieee80211_sta_rates *rates); 4543 4544int ieee80211_rate_control_register(const struct rate_control_ops *ops); 4545void ieee80211_rate_control_unregister(const struct rate_control_ops *ops); 4546 4547static inline bool 4548conf_is_ht20(struct ieee80211_conf *conf) 4549{ 4550 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 4551} 4552 4553static inline bool 4554conf_is_ht40_minus(struct ieee80211_conf *conf) 4555{ 4556 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4557 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 4558} 4559 4560static inline bool 4561conf_is_ht40_plus(struct ieee80211_conf *conf) 4562{ 4563 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4564 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 4565} 4566 4567static inline bool 4568conf_is_ht40(struct ieee80211_conf *conf) 4569{ 4570 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 4571} 4572 4573static inline bool 4574conf_is_ht(struct ieee80211_conf *conf) 4575{ 4576 return conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT; 4577} 4578 4579static inline enum nl80211_iftype 4580ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4581{ 4582 if (p2p) { 4583 switch (type) { 4584 case NL80211_IFTYPE_STATION: 4585 return NL80211_IFTYPE_P2P_CLIENT; 4586 case NL80211_IFTYPE_AP: 4587 return NL80211_IFTYPE_P2P_GO; 4588 default: 4589 break; 4590 } 4591 } 4592 return type; 4593} 4594 4595static inline enum nl80211_iftype 4596ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4597{ 4598 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4599} 4600 4601void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4602 int rssi_min_thold, 4603 int rssi_max_thold); 4604 4605void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4606 4607/** 4608 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4609 * 4610 * @vif: the specified virtual interface 4611 * 4612 * Note: This function assumes that the given vif is valid. 4613 * 4614 * Return: The average RSSI value for the requested interface, or 0 if not 4615 * applicable. 4616 */ 4617int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4618 4619/** 4620 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4621 * @vif: virtual interface 4622 * @wakeup: wakeup reason(s) 4623 * @gfp: allocation flags 4624 * 4625 * See cfg80211_report_wowlan_wakeup(). 4626 */ 4627void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4628 struct cfg80211_wowlan_wakeup *wakeup, 4629 gfp_t gfp); 4630 4631/** 4632 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 4633 * @hw: pointer as obtained from ieee80211_alloc_hw() 4634 * @vif: virtual interface 4635 * @skb: frame to be sent from within the driver 4636 * @band: the band to transmit on 4637 * @sta: optional pointer to get the station to send the frame to 4638 * 4639 * Note: must be called under RCU lock 4640 */ 4641bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 4642 struct ieee80211_vif *vif, struct sk_buff *skb, 4643 int band, struct ieee80211_sta **sta); 4644 4645/** 4646 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 4647 * 4648 * @next_tsf: TSF timestamp of the next absent state change 4649 * @has_next_tsf: next absent state change event pending 4650 * 4651 * @absent: descriptor bitmask, set if GO is currently absent 4652 * 4653 * private: 4654 * 4655 * @count: count fields from the NoA descriptors 4656 * @desc: adjusted data from the NoA 4657 */ 4658struct ieee80211_noa_data { 4659 u32 next_tsf; 4660 bool has_next_tsf; 4661 4662 u8 absent; 4663 4664 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 4665 struct { 4666 u32 start; 4667 u32 duration; 4668 u32 interval; 4669 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 4670}; 4671 4672/** 4673 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 4674 * 4675 * @attr: P2P NoA IE 4676 * @data: NoA tracking data 4677 * @tsf: current TSF timestamp 4678 * 4679 * Return: number of successfully parsed descriptors 4680 */ 4681int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4682 struct ieee80211_noa_data *data, u32 tsf); 4683 4684/** 4685 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 4686 * 4687 * @data: NoA tracking data 4688 * @tsf: current TSF timestamp 4689 */ 4690void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 4691 4692#endif /* MAC80211_H */ 4693